My Return To Planet Earth by Peter Lewis Atkinson
Jake, a teenage boy from Earth, has a chance encounter with three enchanting teenage girls from another world. Jake is then willingly smuggled aboard their spacecraft without the knowledge of the girls' mothers. His incredible adventures take him into various situations and incidents along the way. The people of Earth are far from ready for a first contact situation: let alone Earth ever being considered as a prospective new member of the Alliance of Independent Worlds. Earth is facing a very great danger. Should steps now be taken?
The Chronicles of Jake -- Book 1
This is book one of a three book trilogy.