I'm super into biographies/memoirs, so my favorite book that I've read is Marley and Me by John Grogan
I also like a lot of the books that I've been "made" to read for school. I really liked Lord of the Flies and I especially liked Of Mice and Men
Honorable mentions: Harry Potter is my favorite series, Prisoner of Azkaban and Deathly Hallows are probably my favorite two.
I've read about 50% of The Perks of Being a Wallflower and I really liked it too