The Sacrifice is the fifty-second book in the Animorphs series. It is narrated by Ax.


The war between the Yeerks and the Animorphs is still raging. There are no more secrets - but there are plenty of lies. The kids are fighting harder than they ever thought they could. And they’re about to make the biggest decision they’ve ever had to face. A decision that may eventually break them all.

Ax and the Animorphs have known that the ultimate destruction of the Yeerk pool will give them a huge chance to take back Earth. And they've figured out a way to do it. But there’s no way to destroy the pool without destroying everyone else that may be there. And there’s no more time to think about it. There’s only yes or no...

Taken from

New CharactersEdit


Morpher Morphs acquired Morphs used
Jake -- Peregrine Falcon, Flea, Siberian Tiger
Rachel -- Bald Eagle, Great Horned Owl, Hork-Bajir (Jara Hamee), Flea, Grizzly Bear
Tobias -- Human (Main)
Cassie -- Flea, Osprey, Wolf
Marco -- Osprey, Silverback Gorilla, Flea
Ax Raccoon Northern Harrier, Raccoon, Human (Main), Flea
Visser One -- "Octopus Creature"
James Peregrine Falcon, Red-tailed hawk Peregrine Falcon, Lion, Red-tailed Hawk
Collette -- Crocodile
Kelly -- Bull
Timmy -- Bobcat
Human Controllers -- Six Peregrine Falcons, Rhinoceros, Polar Bear, Cheetah, Seven Wolves


  • The cover quote is, "Everyone has nightmares. But what happens when the nightmares are real?"
  • The inside cover quote is, "Ax has a secret...."
  • ANIBASE: A very interesting editorial mix-up occured with this book. In the manuscript for #50: The Ultimate, one of the new Animorphs, an Asian boy with a speech disability who was confined to a wheelchair, was named Tuan. Sometime before the manuscript became a book, Tuan's name was changed to Timmy. The manuscript for this book, however, was written before the name was changed, and Tuan ended up appearing in this book anyway. Don't be fooled -- Timmy and Tuan are the one and the same!
  • ANIBASE: Captain Olston is a leader at the National Guard base where the Animorphs go to "borrow" bombs to use to blow up the Yeerk Pool. He ends up helping the Animorphs with their task, after Naomi, who was a lawyer for his son, convinces him that he should listen to Jake.


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