"On a sunny September morning, the creatures first appear. Shur sees one of them hovering outside the window in history class: it looks like a giant butterfly, at first too beautiful and strange to seem like a threat. But when emergency alerts light up everyone's phones around her, she realizes something very, very wrong is happening outside. These... things are everywhere. By the time Shur makes it back to her house with her brother, Keene, and their...