Harry Potter and the Deathly Hallows by J.K. Rowling

The heart of Book 7 is a hero's mission--not just in Harry's quest for the Horcruxes, but in his journey from boy to man--and Harry faces more danger than that found in all six books combined, from the direct threat of the Death Eaters and you-know-who, to the subtle perils of losing faith in himself. Attentive readers would do well to remember Dumbledore's warning about making the choice between "what is right and what is easy," and know that Rowling applies the same difficult principle to the conclusion of her series. While fans will find the answers to hotly speculated questions about Dumbledore, Snape, and you-know-who, it is a testament to Rowling's skill as a storyteller that even the most astute and careful reader will be taken by surprise.