I annoys me when people say a Manga book is they're favourite, Manga ain't books, they're comics. >>
My favourite book is probably 'If I Just Had Two Wings'. It was about Black Slavery, but it was a wonderfull story, I loved the character Liney alot, she reminded me of a rabit. Quiet and timid, but can pack a kick and a punch. ;D
The Dragon Lance series, Watership Down, Shogun and anything by Edgar Allen Poe(I dont care if its poetry >.<
Those are fairly advanced, so for some lesser advanced I do enjoy Warriors, as well as Yellow Dog, Holes, and Runt(which I read a long time ago and still love it to this day). I always enjoyed the Eragon series, Wolf Brother, The Devils Arithmatic(About life during the Holocaust), and White Fang.
I forgot to add A Dogs Life! I loved this book so much, and read it quite often, like Runt. Its sad, yet it shows streangth and courage and theres just so much in it its hard to explain and its making me dizzy.