Thomas Taylor is an award-winning author-illustrator for children whose debut novel, Malamander, kicked off this mystery series. He illustrated the cover for the original British edition of the first Harry Potter book and has since gone on to write and illustrate several picture books and young adult novels, including the graphic novel Scarlett Hart: Monster Hunter by Marcus Sedgwick. Thomas Taylor lives on the south coast of England.

Tom Booth makes marks. He makes marks in books like this one, and he sometimes makes marks that move. Some of his marks -- like those in Don't Blink! and This Is Christmas -- have been given stars. Raised just outside Philadelphia, Tom Booth made his earliest marks on his parents' antique table. He thinks the table looks better now. His parents aren't so sure. He lives in Brooklyn.