The Mutation is the thirty-sixth book in the Animorphs series, written by K.A. Applegate. It is narrated by Jake.

Official DescriptionEdit

Visser Three is still trying to find a way to reach the Pemalite ship. The ship that was hidden thousands of feet below the ocean's surface. A ship containing technology so advanced that it is superior to anything even the Andalites have built. And this time, the visser plans to find the ship so he can use the power to complete Earth's invasion.

Jake, the other Animorphs, and Ax acquire additional deep-sea morphs in order to stop the visser's plan. But while trying to destroy the Yeerk ship, the kids make a startling discovery: an underwater civilization. Have the kids discovered Atlantis...or is it just another trap?

Animorphs mutation book 36 inside cover

Inside cover


Morpher Morphs acquired Morphs used
Jake Orca Peregrine Falcon, Orca, Hammerhead Shark, Great Horned Owl, Siberian Tiger
Rachel Orca Orca, Sperm Whale, Hammerhead Shark, Great Horned Owl, Grizzly Bear
Cassie Orca Orca, Hammerhead Shark, Great Horned Owl, Wolf
Marco Orca Osprey, Orca, Hammerhead Shark, Great Horned Owl, Silverback Gorilla
Tobias Orca, Nartec Orca, Sperm Whale, Hammerhead Shark, Nartec
Ax Orca Orca, Hammerhead Shark, Great Horned Owl
Visser Three -- Unnamed Giant Squid-like creature, Luminar


  • The cover quote is, "You won't even get the chance to change your mind...."
  • The inside cover quote is, "The Animorphs have a whale of a problem...."
  • ANIBASE: One of the downfalls of writing a series is the need to keep coming up with new idea after new idea. "Frankly", K.A. Applegate says of this book, "I think I was getting a little desperate for ideas!" Here's what she had to say about what might have been the influence for this book: "I used to write Little Mermaid books for Disney, so maybe this was my anti-Ariel fantasy."
  • ANIBASE: Queen Soco is the leader of the mutated Nartec. She cares only about her people, and has a grand, never-to-be-fulfilled goal of one day overtaking the world of Surface-Dwellers. Naca was a Nartec guard assigned to the Animorphs.


International CoversEdit

Taken from

Main Series #1 The Invasion | #2 The Visitor | #3 The Encounter | #4 The Message | #5 The Predator | #6 The Capture | #7 The Stranger | #8 The Alien | #9 The Secret | #10 The Android | #11 The Forgotten | #12 The Reaction | #13 The Change | #14 The Unknown | #15 The Escape | #16 The Warning | #17 The Underground | #18 The Decision | #19 The Departure | #20 The Discovery | #21 The Threat | #22 The Solution | #23 The Pretender | #24 The Suspicion | #25 The Extreme | #26 The Attack | #27 The Exposed | #28 The Experiment | #29 The Sickness | #30 The Reunion | #31 The Conspiracy | #32 The Separation | #33 The Illusion | #34 The Prophecy | #35 The Proposal | #36 The Mutation | #37 The Weakness | #38 The Arrival | #39 The Hidden | #40 The Other | #41 The Familiar | #42 The Journey | #43 The Test | #44 The Unexpected | #45 The Revelation | #46 The Deception | #47 The Resistance | #48 The Return | #49 The Diversion | #50 The Ultimate | #51 The Absolute | #52 The Sacrifice | #53 The Answer | #54 The Beginning
Megamorphs The Andalite's Gift | In the Time of Dinosaurs | Elfangor's Secret | Back to Before
Chronicles The Andalite Chronicles | The Hork-Bajir Chronicles | VISSER | The Ellimist Chronicles
Alternamorphs The First Journey | The Next Passage
TV Tie-Ins Meet the Stars of Animorphs