Underground the book is 33 strategies of war by robert greene. he wrote two others worth reading, Seduction, and 48 Laws of power. I would skip the 50th law (no fear) because he wrote it practicing the principles in 48 laws of power, (sucking up to that POS 50 cent).
I read them all at least once per year. If i had read them… in SCHOOOOOL i wouldnt have found myself homeless all those years ago.
Never be afraid to do the righteous thing, nothing righteous is ever easy.