It took me just a few hours to read The Graveyard Book (Neil Gaiman, 2008). It's YA, so it's not a long book, and there's a spooky lyricism to both the writing and the story that kept me turning the pages.
It's Jungle Book in a graveyard, basically, with ghosts taking the place of the animals and bringing up a boy who alone of his family survived a gruesome murder. An eerie, wistful coming-of-age story...really, it's hard to describe this book. If the concept appeals to you at all, you should just go read it.