:How to win friends and influence people" is probably the most important one I ever read.
My favorite book though was one I read in 7th grade for the first time and have read it another 10 or so times "Watership Down". Probably makes me half a fag or something, but I love that book.
recent stuff would be The Imperial Cruise or really anything written by James Bradley, Erik Larsen, Michael Lewis
then again i'm reading about the history of salt right now so not sure my choice in books is for everyone