Shantaram is incredible, I can only think of the original Dune novels by Frank Herbert as comparable in depth, scope and revelation of what it is to be human.

Shantaram's author claims use of artistic license in names, character descriptions and details, in order to protect those described from repercussions. Reading the extraordinary story and arc, and subsequently learning of the fact that later in real life the author later went on to marry into Czech royalty, it's easy to believe it as a fundamentally true account.