Andrew and Ham's Space Adventures - B J Chen - Bog

This work of ecofiction follows the adventures of Andrew who teams up with Ham, an alien from a vastly advanced civilization who assumes the guise of a housecat. They first meet when Ham makes a detour to Earth to enlist Andrew's help to rid his Mothership of a dangerous creature that has hitchhiked on board. This mission requires Andrew to travel back to ancient Egypt with Ham. As a practice run, the pair travel forward in time to 2099 only to find that Earth is imperilled by plastic pollution. Andrew realises that before he can assist Ham and the Mother apprehend the creature, he needs their help to save his own planet Earth from a disaster of mankind's own making.