Neil Gaiman has written highly acclaimed books for both children and adults and is the first author to have won both the Carnegie and Newbery Medals for the same work The Graveyard Book. The L.A. Times has described his multi-million-selling graphic novel series Sandman as 'the greatest epic in the history of comic books'.

Many of his books, including Coraline and Stardust, have been made into films, Neverwhere has been adapted for TV and radio and American Gods is in development as a major HBO series. He has also written two amazing episodes of Doctor Who and appeared in The Simpsons as himself.

In 2013 he published his first adult novel for seven years, The Ocean at the End of the Lane, which received stellar reviews and was a bestseller around the world.

Adam Rex is the New York Times best-selling author and illustrator of Frankenstein Makes a Sandwich. His other books include The True Meaning of Smekday, which was made into the hit animated movie Home; Moonday; and School's First Day of School, illustrated by Christian Robinson.

He also illustrated the Brixton Brothers series, Billy Twitters and His Blue Whale Problem, Chloe and the Lion, and How This Book Was Made, all by Mac Barnett, and Chu's Day, by Neil Gaiman. He lives in Tucson, Arizona.