(From the publisher):
The strange visitors had landed. Why had they come, and what unknown terror would they bring upon our world? These children from another time, another planet, were able to read human minds. They were utterly invincible.
Original title: Four from Planet 5
Genre: Fiction→ Science Fiction→ Species Evolution→ Psionic Powers
Fiction→ Science Fiction→ Alien Beings→ Alien Invasion & Post-occupation