Rachel has a strong personality. But it's not strong enough for two people. And now that's the situtation. When thatlittle boy on the beach cut a starfish in two with his spade, he had no idea what he'd done...Now the Animorphs have anew member - or is that two new members?

Sweet wimpish Rachel who's too terrified to morph, and fierce, cruel Rachel who's prepared to do anything to anyone - to get what she wants...And the Animprphs have no idea how to get the real Rachel back - before the "twins" manage to blow their cover...