The mutation

"Les cinq adolescents, portant désormais le nom d'Animorphs, continuent leur lutte contre les extraterrestres qui veulent asservir la race humaine. Ils se servent du pouvoir spécial que leur a conféré l'un d'eux... Trame étirée, de piètre qualité, avec des passages violents."
"There is a computer called Mother that runs the ship keeping the remaining members of the human race alive. And that computer has the ability to create imaginary worlds filled with things that don't--can't--exist. The problem is that this computer has evolved. It experiences emotion. And it is out of control."@en
""There is a computer called Mother that runs the ship keeping the remaining members of the human race alive. And that computer has the ability to create imaginary worlds filled with things that dont' - can't - exist."--Back cover."@en
"Morphing into killer whales, the Animorphs discover a whole new world where humans with gills exist in the deep waters below."@en
"While Jake and the other Animorphs try to stop Visser Three from reaching the Pemalite ship at the bottom of the ocean, they discover a strange underwater civilization."@en
"While Jake and the other Animorphs try to stop Visser Three from reaching the Pemalite ship at the bottom of the ocean, they discover a strange underwater civilization."
"WHILE TRYING TO DESTROY A YEERK SHIP, THE KIDS DISCOVER AN UNDERWATER CIVILIZATION."