I just finished "These Are The Voyages: TOS Season 1", the closest thing Trek fans will get to Rinzler's Making Of's. The author (who I've talked to a few times) got access to every draft of every script, every note, every memo, everything that they saved, which they saved everything just for a book like this to be made. Roddenberry actually asked Cushman to write the book years ago, he was just now able to get it done. Cushman also got the Nielson ratings for every episode, proving without a doubt that TOS was popular and was the highest rated NBC show on Thursday nights, but it cost more money than they wanted and Roddenberry wasn't the easiest guy to get along with. I'm really looking forward to starting the second book covering Season 2.