This book, and this series, was built on a lot of input and help from a lot of smart and kind people, starting with forensic pathologist Dr. Cynthia Gardner, astronomer Dr. Timothy Spahr, and my brother, Andrew Winters.
Thanks to my wife, Diana; to my parents and her parents.
To early readers Nick Tamarkin and Kevin Maher; to everybody at Quirk Books, especially Jason Rekulak and Jane Morley; to Joelle Delbourgo and Shari Smiley and Molly Lyons.
To Don Mattingly of Mattingly Concrete; Katy and Tim Carter and their chickens; planetary scientist Professor Don Korycansky at UC Santa Cruz; everybody at the Concord, New Hampshire, Police Department, especially Officer Ryan Howe and Lieutenant Jay Brown; Detective Todd Flanagan at the New Hampshire Attorney General’s office; Russ Hanser; Danice Sher (PA), Dr. Ratik Chandra, Dr. Nora Osman, and Dr. Zara Cooper; and Amish experts Professor David Weaver-Zercher and Professor Steve Nolt.