Steve Jobs: The Exclusive Biography by Walter Isaacson.
My favorite book of all time, this is the longest book I have read, and also the only one I have read multiple times. Something about the personal journey tied so closely with his professional life make me aspire to his ability and achievements.
The biography has a good number of interviews from family members, friends, colleagues and competitors, which make it an ultimate insight into the life of Steve Jobs.
Honestly speaking, there are points in the book which may make you question whether you even like the guy, but then you're pulled back in to balance with the fact that you're given an insight into how he was able to do such a marvelous job at creating, directing, selling and revolutionizing.
“My job is to say when something sucks rather than sugarcoat it."
One lesson that I remember daily from this book is the way that Jobs was able to declutter Apple's matrix of excessive efforts and simplify it into a 2 x 2 grid, which we now know was the Macbook 13" and 15" and Macbook Pro 13" and 15". This has stuck with me forever, as I really think we try and solve too many issues for too many people - and the best thing we can do is solve one issue really well for one person.