DARTH PLAGUEIS: THE CANON EDIT is a novel fanedit designed to bring the iconic novel and its associated tie-ins into Disney’s canon timeline. Version 2.0 is out.
I’ve always loved this book and felt that it’s the most essential piece of Star Wars tie-in media. It contextualizes the entire Prequel Trilogy and discusses themes prevalent throughout the franchise. It should be alongside The Clone Wars as a crucial section of the PT, regardless of canonicity. However, it conflicts heavily with canon in a few major areas. Namely, the origins of Maul and the events surrounding Dooku’s departure from the Jedi Order differ completely from their canon depictions. These sections have been cleverly rearranged and rewritten to make them consistent with canon content such as Son of Dathomir and Dooku: Jedi Lost. The original novel was also interesting in that it heavily references and crossed over with two other novels: Cloak of Deception and Darth Maul: Shadow Hunter. Since both novels do not clash with canon, they have been chronologically spliced into Darth Plagueis. The interesting thing is that the canon novel “Tarkin” (also by James Luceno) makes direct references to the events of Cloak of Deception, making its inclusion even more valid. Dialogue additions have been added carefully and with discretion to avoid this being fanfiction and keep the edits invisible. The result is a seamless (very long) epic about the years leading up to the Prequels. If you haven’t read the original novel or read it years ago, I think it would be incredibly difficult to spot where the book has been edited.
NOTE: There is still one contradiction to canon. Veruna’s status as a immediate predecessor to Padme is retained. This is because multiple canon sources differ on this. The Queen’s Peril books describe two Queens ruling immediately before Padme. Tarkin and canon reference books describe Veruna’s term as identical to Legends. The latter canon explanation has been chosen. References to EU Old Republic content have also been kept. Until they do KOTOR content, this won’t be contradicted in any case.