Reading level 3
Author Sharon Gosling
Alex is an ordinary boy who keeps seeing weird things. They look like people, only they're not really there. But somehow, Alex knows they're not ghosts. A night-time knock at the door reveals the shocking truth behind Alex's visions. He is needed - to help stop an invasion! Whisked off to a secret government facility (in the Bermuda Triangle), Alex joins a task force of young people battling to save the planet! But just what is it they are fighting against?