What is the best book I could read that will help me learn more about life?

I want a book that will ultimately change my view on life. Currently I feel as if im lost. Im only 17 but over the last year I have completely changed for the worst and Im not sure what to do at this point. I want to read a book that will give me great advice and help me "find myself" I guess you could say. So any suggestions of books that you have read that had a profound effect on you? Also, my reading level tremendously exceeds my age's average reading level so the complexity of the book shouldnt be a problem for me