Tom Fletcher and Dougie Poynter of the UK group McFly have a shared obsession with poop! After writing songs together for nine years in the band McFly, they wrote The Dinosaur That Pooped a Planet! and The Dinosaur That Pooped the Past! in the same way that they write their song lyrics. They both live in the UK.

Garry Parsons is the award-winning illustrator of many books, including George’s Secret Key to the Universe, George’s Cosmic Treasure Hunt, and George and the Big Bang by Lucy and Stephen Hawking; Billy’s Bucket by Kes Gray; and What’s Cool About School by Kate Agnew. He lives in London. Visit him at GarryParsons.co.uk. - (Simon and Schuster)