I read the book reviewed in the link because Alcibiades was such an interesting character in Assassin's Creed :-).

The book is very enjoyable - it's a non-fiction book, but aimed to be readable in the style of a historical fiction novel. The events are all true, but the author takes considerable (and fun) license on the details of the narrative to flesh out the events. Highly recommended, and yes - what an amazing life.