Books in the Alien Invaders series in order

Five awesome aliens have been unleashed from the darkest corner of the galaxy - and they're out to destroy the universe. Recruited by the elite defence organisation G-Watch to defend the galaxy, Cosmo must prove himself and commence battle against the deadliest aliens in space .

Five terrifying aliens have been unleashed from the darkest corner of the galaxy - and they're out to destroy the universe. Only Cosmo, a young boy from planet Earth, has the power to stop them. Recruited by the elite defence organisation G-Watch to defend the galaxy, Cosmo must prove himself.

Five terrifying aliens have been unleashed from the darkest corner of the galaxy, and they're out to destroy the universe. Only Cosmo, a young boy from planet Earth, has the power to stop them. Recruited by the defence organisation G-Watch to defend the galaxy, Cosmo must prove himself and commence battle against the deadliest aliens in space...