Books in the The Wrong Side of the Galaxy series

Abducted by aliens, Harry wakes up on his birthday marooned on a spaceship. His only companions: two freaky princess clones, a weird alien-fish-kangaroo hybrid with delusions of grandeur and a ship's computer with a serious attitude problem. It's the worst birthday ever.How is he ever going to get back to Earth now?A brilliantly silly new story from the winner of the Roald Dahl Funny Prize