Every You, Every Me by David Levithan

As his best friend Ariel once told him, Evan understands that you can't ever know everything. He knew Ariel, but Ariel was someone else when she wasn't with him. Sometimes she was someone else even when she was with him. And he was someone else when he wasn't with her. But now that she's gone, he struggles to understand if he ever knew her at all.

Ariel has gone away and Even is struck with tremendous guilt over whether or not it was his fault that she's no longer here. And his anxiety becomes even more overwhelming and troublesome when he begins to receive photographs of Ariel. He knows that she can't be delivering them herself . . . but what if she is?

This novel is extraordinarily unique in its storytelling, and it is worth fumbling through every page and every struggle to uncover the answers as only David Levithan would reveal them. Recommended to high school readers. Reviewed by kate the librarian.