Time travel is tricky. And so is this book.Things start out unclear, and I began reading with interest. And then I blinked and I was 200 pages in. And then I was gripping the book so hard my fingers turned white, and then I read the last sentence.Nothing about the plot or villain or main characters is easy or plain. And that's what made it so magnetic. I'm still kind of in shock. It ended just the way it should have. You know, after squeezing my heart right before. I love Em and Finn. So much. And I love a book that can take me by such surprise.