Space Brat Series by Bruce Coville

Space Brat is Bruce Coville's first installment in the Space Brat series, illustrated by Kathrine Coville.After running off, Blork loses his way and lands in a strange place ruled by a grumpy man named Squat, a creature who, Blork discovers, is nastier and brattier than Blork.

On a class field trip to the Museum of New Inventions, bratty Blork is pulled inside a copy machine which creates his evil twin.

What is Squat's Evil Plan?When Blork is declared a hero and invited to the Galactic Celebration, his old enemy, Squat, decides it is time to take revenge. With the help of his personal mad scientist, Squat hatches a plan to humiliate Blork in front of the entire galaxy.Soon Blork and his friends are hurtling through space, on a trip toward destiny, crankiness, and the strangest tantrum in the history of the galaxy.

Finding himself and his crew on the silliest planet in the universe after a mischievous mad scientist fiddles with the spaceship wiring, Captain Blork is challenged to discover the planet's strange secret.

Blork and his friends run into a prehistoric poodnoobie when they accidentally travel back in time to Splat. There, they learn how to survive in a world filled with enormous creatures that can't wait to find out what they taste like. Until they meet the most mysterious creature of all--and Blork is forced to make a terrible decision that will affect the future of the entire planet.