It takes a lot of people to make something like this happen. Firstly, I would like to thank my editor, Greg Ferguson, whose exceptional insight and guidance were key in helping this mysterious book come fully to life, and Nico Medina, for his marvelous attention to detail. Thank you to all of the amazing folks at Egmont USA—from Elizabeth Law and Doug Pocock to Regina Griffin, Alison Weiss, Rob Guzman, Mary Albi, and all the editing staff and sales and marketing team—for helping me put Oona’s story into book form. Thank you to my wonderful agent, Catherine Drayton, for her marvelous perspectives and unfailing support. Also, much thanks and love to my mother, who is nearly always my first reader, and the first to tell me if it works or not. Thanks to all of the early readers for their invaluable feedback, and last, but certainly not least, I thank my wife, Shari, who has taken such good care of me. It is because of that love and care that this story is where it is today. I know that. I feel truly blessed.