Here's Palpatine's revelation in the novelization. It starts off with Palpatine talking about how Padme might be betraying him and Anakin, with no mention of the Sith secret yet. I know it's a bit long, but is this board not for reading? Besides, it's great writing, and it's Star Wars! I love it, personally:
"She couldn't --" Anakin pressed a hand to his forehead; his dizziness was getting worse. When had he last eaten? He couldn't remember. It might have been before the last time he'd slept. "She could never..."
"Of course she could," Palpatine said. "That is the nature of politics, my boy. Don't take it too personally. It doesn't mean the two of you can't be happy together."
"What--?" The room seemed to darken around him. "What do you mean?"
"Please, Anakin. Are we not past the point of playing childish games with one another? I know, do you understand? I have always known. I have pretended ignorance only to spare you discomfort."
Anakin had to lean on the desk. "What -- what do you know?"
"Anakin, Padme was my Queen; I was her ambassador to the Senate. Naboo is my home. You of all people know how I value loyalty and friendship; do you think I have no friends among the civil clergy in Theed? Your secret ceremony has never been secret. Not from me, at any rate. I have always been very happy for you both."
"You--" Words whirled through Anakin's mind, and none of them made sense. "But if she's going to betray us--"
"That, my boy," Palpatine said, "is entirely up to you."
The dog inside Anakin's head seemed to solidify into a long, dark tunnel. The point of light at the end was Palpatine's face. "I don't -- I don't understand..."
"Oh yes, that's very clear." The Chancellor's voice seemed to be coming from very far away. "Please sit, my boy. You're looking rather unwell. May I offer you something to drink?"
"I -- no. No, I'm all right." Anakin sank gratefully into the dangerously comfortable chair. "I'm just -- a little tired, that's all."
"Not sleeping well?"
"No." Anakin offered an exhausted chuckle. "I haven't been sleeping well for a few years, now."
"I quite understand, my boy. Quite." Palpatine rose and rounded his desk, sitting casually on its front edge. "Anakin, we must stop pretending. The final crisis is approaching, and our only hope to survive it is to be completely, absolutely, ruthlessly honest with each other. And with ourselves. You must understand that what is at stake here is nothing less than the fate of the galaxy."
"I don't know--"
"Don't be afraid, Anakin. What is said between us here need never pass beyond these walls. Anakin, think: think how hard it has been to hold all your secrets inside. Have you ever needed to keep a secret from me?"
He ticked his fingers one by one. "I have kept the secret of your marriage all these years. The slaughter at the Tusken camp, you shared with me. I was there when you executed Count Dooku. And I know where you got the power to defeat him. You see? You have never needed to pretend with me, the way you must with your Jedi comrades. Do you understand that you need never hide anything from me? That I accept you exactly has you are?"
He spread his hands as though offering a hug. "Share with me the truth. Your absolute truth. Let yourself out, Anakin."
"I --" Anakin shook his head. How many times had he dreamed of not having to pretend the perfect Jedi? But what else could he be? "I wouldn't even know how to begin."
"It's quite simple, in the end: tell me what you want."
Anakin squinted up at him. "I don't understand."
"Of course you don't." The last of the sunset haloed his ice-white hair and threw his face into shadow. "You've been trained to never think about that. The Jedi never ask what you want. They simply tell you what you're supposed to want. They never give you a choice at all. That's why they take their students -- their victims -- at an age so young that choice is meaningless. By the time a Padawan is old enough to choose, he has been so indoctrinated -- so brainwashed -- that he is incapable of even considering the question. But you're different, Anakin. You had a real life, outside the Jedi Temple. You can break through the fog of lies the Jedi have pumped into your brain. I ask you again: what do you want?"
"I still don't understand."
"I am offering you... anything," Palpatine said. "Ask, and it is yours. A glass of water? It's yours. A bag full of Corusca gems? Yours. Look out the window behind me, Anakin. Pick something, it's yours."
"Is this some kind of joke?"
"The time for jokes is past, Anakin. I have never been more serious." Within the shadow that cloaked Palpatine's face, Anakin could only just see the twin gleams of the Chancellor's eyes. "Pick something. Anything."
"All right..." Shrugging, frowning, still not understanding, Anakin looked out the window, looking for the most ridiculously expensive thing he could spot. "How about one of those new SoroSuub custom speeders--"
"Done."
"Are you serious? You know how much one of those costs? You could practically outfit a battle cruiser--"
"Would you prefer a battle cruiser?"
Anakin went still. A cold void opened in his chest. In a small, cautious voice, he said, "How about the Senatorial Apartments?"
"A private apartment?"
Anakin shook his head, staring up at the twin gleams in the darkness on Palpatine's face. "The whole building."
Palpatine did not so much as blink. "Done."
"It's privately owned--"
"Not anymore."
"You can't just--"
"Yes, I can. It's yours. Is there anything else? Name it."
Anakin gazed blankly out into the gathering darkness. Stars began to shimmer through the haze of twilight. A constellation he recognized hung above the spires of the Jedi Temple.
"All right," Anakin said softly. "Corellia. I'll take Corellia."
"The planet, or the whole system?"
Anakin stared.
"Anakin?"
"I just--" He shook his head blankly. "I can't figure out if you're kidding, or completely insane."
"I am neither, Anakin. I am trying to impress upon you a fundamental truth of our relationship. A fundamental truth of yourself."
"What if I really wanted the Corellian system? The whole Five Brothers -- all of it?"
"Then it would be yours. You can have the whole sector, if you like." The twin gleams within the shadow sharpened. "Do you understand, now? I will give you anything you want."
The concept left him dizzy. "What if I wanted -- what if I went along with Padme and her friends? What if I want the war to end?"
"Would tomorrow be too soon?"
"How--" Anakin couldn't seem to get his breath. "How can you do that?"
"Right now, we are only discussing what. How is a different issue; we'll come to that presently."
Anakin sank deeper into his chair while he let everything sink deeper into his brain. If only his would would stop spinning -- why did Palpatine have to start all this now?"
This would all be easier to comprehend if the nightmares of Padme didn't keep screaming inside his head.
"And in exchange?" he asked, finally. "What do I have to do?"
"You have to do what you want."
"What I want?"
"Yes, Anakin. Yes. Exactly that. Only that. Do the one thing that the Jedi fear most: make up your own mind. Follow your own conscience. Do what you think is right. I know that you have been longing for a life greater than that of an ordinary Jedi. Commit to that life. I know you burn for greater power than any Jedi can wield; give yourself permission to gain that power, and allow yourself license to use it. You have dreamed of leaving the Jedi Order, having a family of your own -- one that is based on love, not on enforced rules of self-denial."
"I -- can't... I can't just... leave..."
"But you can."
Anakin couldn't breathe.
He couldn't blink.
He sat frozen. Even thought was impossible.
"You can have every one of your dreams. Turn aside from the lies of the Jedi, and follow the truth of yourself. Leave them. Join me on the path of true power. Be my friend, Anakin. Be my student. My apprentice."
Anakin's vision tunneled again, but this time there was no light at the far end. He pulled back his hand, and it was shaking as he brought it up to support his face.
"I'm sorry," he said. "I'm sorry, but -- but as much as I want those things -- as much as I care for you, sir -- I can't. I just can't. Not yet. Because there's only one thing I really want, right now. Everything else will just have to wait."
"I know what you truly want," the shadow said. "I have only been waiting for you to admit it to yourself." A hand -- a human hand, warm with compassion -- settled onto his shoulder. "Listen to me: I can help you save her."
"You --"
Anakin blinked blindly.
"How can you help?"
"Do you remember that myth I told you of, The Tragedy of Darth Plagueis the Wise?" The shadow whispered.
The myth --
... directly influence the mid-chlorians to create life; with such knowledge, to maintain life in someone already living would seem a small matter...
"Yes," Anakin said. "Yes, I remember."
The shadow leaned so close that it seemed to fill the world.
"Anakin, it's no mere myth."
Anakin swallowed.
"Darth Plagueis was real."
Anakin could force out only a strangled whisper. "Real...?"
"Darth Plagueis was my master. He taught me the key to his power," the shadow said, dryly matter-of-fact, "before I killed him."
Without understanding how he had moved, without even intending to move, without an transition of realization or dawning understanding, Anakin found himself on his feet. A blue bar of sizzling energy terminated a centimeter from Palpatine's chin, its glow casting red-edged shadows up his face and across the ceiling.
Only gradually did Anakin come to understand that this was his lightsaber, and it was in his hand.
"You," he said. Suddenly he was neither dizzy nor tired.
Suddenly everything made sense.
"It's you. It's been you all along!"
In the clean blue light of his blade he stared into the face of a man whose features were as familiar to him as his own, but now seemed as alien as an extragalactic comet -- because now he finally understood that those familiar features were only a mask.
He had never seen this man's real face.
"I should kill you," he said. "I will kill you!"
Palpatine gave that wise, kindly-uncle smile Anakin had been seeing since the age of nine. "For what?"
"You're a Sith Lord!"
"I am," he said simply. "I am also your friend."
The blue bar of energy wavered, just a bit.
"I am also the man who has always been here for you. I am the man you have never needed to lie to. I am the man who wants nothing from you but that you follow your conscience. If that conscience requires you to commit murder, simply over a... philosophical difference... I will not resist."
His hands opened, still at his sides. "Anakin, when I told you that you can have anything you want, did you think I was excluding my life?"
The floor seemed to soften beneath Anakin's feet, and the room started to swirl darkness and ooze confusion. "You -- you won't even fight --?"
"Fight you?" In the blue glow that case shadows up Palpatine's chin, the Chancellor's chin, the Chancellor looked astonished that he would suggest such a thing. "But what will happen when you kill me? What will happen to the Republic?" His tone was gently reasonable. "What will happen to Padme?"
"Padme..."
Her name was a gasp of anguish.
"When I die," Palpatine said with the air of a main reminding a child of something he ought to already know, "my knowledge dies with me."
The sizzling blade trembled.
"Unless, that is, I have the opportunity to teach it... to my apprentice..."
His vision swam.
"I..." A whisper of naked pain, and despair. "I don't know what do do..."
Palpatine gazed upon him, loving and gentle as he had ever been, though only a whisker shy of a lightsaber's terminal curve.
And what if this face was not a mask? What if thet rue face of the Sith was exactly what he saw before him: a man who had cared for him, had helped him, had been his loyal friend when he'd thought he had no other?
What then?
"Anakin," Palpatine said kindly, "let's talk."
Epic, eh? Obviously impossible to do for an edit, but it shows just how amazing the scene could be/have been. Then it goes to the Obi-Wan/Grievous battle. When we return to Palpatine's office, Stover does one of the novel's best features: an break-down of a character. He starts with "This is how it feels to be _____, right now:", then goes into epic details of said character at that very moment. And so, as Obi-Wan faces Grievous:
This is how it feels to be Anakin Skywalker, right now:
You don't remember putting away your lightsaber. You don't remember moving from Palpatine's private office to his larger public one; you don't remember collapsing in the chair where you now sit, nor do you remember drinking water from the half-empty glass that you find in your mechanical hand.
You remember only that the last man in the galaxy you still thought you could trust has been lying to you since the day you met.
And you're not even angry about it.
Only stunned.
"After all, Anakin, you are the last man who has a right to be angry at someone for keeping a secret. What else was I to do?"
Palpatine sits in his familiar tall oval chair behind his familiar desk; the lampdisks are full on, the office eerily bright.
Ordinary.
As though this is merely another one of your friendly conversations, the casual evening chats you've enjoyed together for so many years.
As though nothing has happened.
As though nothing has changed.
"Corruption had made the Republic a cancer in the body of the galaxy, and no one could burn it out; not the judicials, not the Senate, not even the Jedi Order itself. I was the only man strong and skilled enough for this task; I was the only man who dared even attempt it. Without my small deception, how should I have cured the Republic? Had I revealed myself to you, or to anyone else, the Jedi would have hunted me down and murdered me without trial -- very much as you nearly did, only a moment ago."
You can't argue. Words are beyond you.
He rises, moving around his desk, taking one of the small chairs and drawing it close to yours.
"If only you could know how I have longed to tell you, Anakin. All these years -- since the very day we met, my boy. I have watched over you, waiting as you grew in strength and wisdom, biding my time until now, today, when you are finally ready to understand who you truly are, and your true place in the history of the galaxy."
Numb words blur from your numb lips. "The chosen one..."
"Exactly, my boy. Exactly. You are the chosen one." He leans toward you, eyes clear. Steady. Utterly honest. "Chosen by me."
He turns a hand toward the panorama of light-sprayed cityscape through the window behind his desk. "Look out there, Anakin. A trillion beings on this planet alone -- in the galaxy as a whole, uncounted quadrillions -- and of them all, I have chosen you, Anakin Skywalker, to be the heir to my power. To all that I am."
"But that's not... that's not the prophecy. That's not the prophecy of the chosen one..."
"Is this such a problem for you? Is it not your quest to find a way to overturn prophecy?" Palpatine leaned close, smiling, warm and kindly. "Anakin, do you think the Sith did not know of this prophecy? Do you think we would simply sleep while it came to pass?"
"You mean --"
"This is what you must understand. This Jedi submission to fate... this is not the way of the Sith, Anakin. This is not my way. This is not your way. It has never been. It need never be."
You're drowning.
"I am not...," you hear yourself say, "... on your side. I am not evil."
"Who said anything about evil? I am bringing peace to the galaxy. Is that evil? I am offering you the power to save Padme. Is that evil? Have I attacked you? Drugged you? Are you being tortured? My boy, I am asking you. I am asking you to do the right thing. Turn your back on treason. On all those who would harm the Republic. I'm asking you to do exactly what you have sworn to do: bring peace and justice to the galaxy. And save Padme, of course -- haven't you sworn to protect her, too...?"
"I -- but -- I --" Words will not fit themselves into the answers you need. If only Obi-wan were here -- Obi-wan would know what to say. What to do.
Obi-Wan could handle this.
Right now, you know you can't.
"I -- I'll turn you over to the Jedi Council -- they'll know what to do --"
"I'm sure they will. They are already planning to overthrow the Republic; you'll give them exactly the excuse they're looking for. And when they come to execute me, will that be justice? Will they be bring peace?"
"They wont -- they wouldn't --!"
"Well, of course I hope you're correct, Anakin. You'll forgive me if I don't share your blind loyalty to your comrades. I suppose it does indeed come down, in the end, to a question of loyalty," he said thoughtfully. "That's what you must ask yourself, my boy. Whether your loyalty is to the Jedi, or to the Republic."
"It's not -- it's not like that--"
Palpatine lifted his shoulders. "Perhaps not. Perhaps it's simply a question of whether you love Obi-Wan Kenobi more than you love your wife."
There is no more searching for words.
There are no longer words at all.
"Take your time. Meditate on it. I will still be here when you decide."
Inside your head, there is only fire. Around your heart, the dragon whispers that all things die.
This is how it feels to be Anakin Skywalker, right now.
(note that throughout the book, Anakin's fear is described as a dragon inside of him destroying him, a cool analogy)