I could not have written this book without Rachel Rudolf, who told me about the forensics day camp at the University of Toronto, Mississauga campus. Rachel also spent several days with me at the camp in July 2014, answered many questions about forensics and read an early draft of this story. Thanks also to Tracy Rogers, director of the University of Toronto’s Forensic Science program, for letting me attend camp for a week, and to forensic-anthropology students and counselors Tori Berezowski and Danielle Stoewner for being smart and fun and putting up with my many questions. Special thanks to the kids I met at camp—for sharing their love of forensic science and for not minding having a curious, noisy adult around all week: Ben Allday, Isaiah Chidambaram, Lavinia Contreras, Harriet Dolenko, Michael D’Onofrio, Katherine Fay, Patrick Kuo, Monica Lamacchia, Sophie Mahan, Anthony Marchetta, Alexandra Markiewicz, Callum McDonell, Christian Palermo, Kyle Rakoczy, Delaney Ras, Jacob Russo, Megan Shih, Zoe Szabo, Mason Vaccari, Megan Wahl and Wan Yun Xue. Thanks also to my friend Viva Singer for her expertise about all things dog related and for letting me talk through another story with her. Finally, many, many thanks to the entire team at Orca, especially my editor and friend, Sarah Harvey, for her wise guidance.