What book you wish you would have read earlier in your life that might have changed your life tranjectory?

I am 23 right now , and I am on the edge making some serious life decisions. Like job, my city , work , love life.. you know. And i know some wisdom out there that I can use so that I can walk little better or choose something better.

I wanna know what books you read later in your life that you regret not reading in your early 20's because that would have changed your life altogether