I hesitate to give away even one more little thing, because this is a book of subtly shifting perceptions, of Seth’s slowly growing understanding—maybe—of what’s really going on, with his surroundings, with himself, with others.
I'm not fond of simplistic books with easy answers. I can't stand supposedly uplifting books with everything all tied up neatly at the end. This book is not like that. More than this is more deftly written, more exciting, more suspenseful, and more meaningful than you expect.
(Not to be coy. I guess I can at least tell you this is a YA book that might be called science fiction, by Patrick Ness, an author who has the rare distinction of being awarded two Carnegie Medals, one in 2011, one in 2012, for best new children’s or young adult book published in the UK.)