Cosmic Colin Books in Order

Alien Harry arrives in his spacebin to take Colin on another adventure, but Colin's troublesome little brother must accompany them. His constant sneezing becomes an added complication when the travelers encounter hostile aliens away from Earth.

Colin grows suspicious of his unusually tidy new classmate Harry, who spends time inside a school rubbish bin. Following him reveals lights and machinery instead of waste, launching Colin into an unexpected journey beyond ordinary classroom life.

Harry and Colin visit a planet ruled by enormous hamsters and are captured during a sightseeing expedition. Treated as classroom pets and confined to a human-sized cage, they must find a way out before holiday care makes matters worse.

Escaped criminal Galactic Gary seeks a time bomb capable of scrambling the days of the week. Harry and Colin race across three planets to recover its hidden components before the villain can threaten more than ordinary life in the galaxy.