Dooku: Jedi Lost by Cavan ScottUnlike other Star Wars audiobooks, which are readings of books that were written for print, Dooku: Jedi Lost was made especially for audio - the first Star Wars book of its kind. It's also narrated by a full cast playing the different characters in the story, in a way more like a radio play than a book.
The "book" is a sort of origin story for Count Dooku, telling the backstory of how he rose in the Jedi ranks and ultimately ended up leaving the order and turning to the dark side. In the story, his background is being researched during the Clone Wars by his apprentice, Asajj Ventress.
If you don't like to listen to audiobooks or aren't able to, you can also buy the script of the story as a printed book.
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This is a book from the New Canon timeline! It's guaranteed to be consistent with future movies, TV shows, books, and comics (and all new stories since mid-2014).