The Decision is the eighteenth book in the Animorphs

Animorphs

Animorphs is an English language science fiction series of young adult books written by K. A. Applegate and published by Scholastic. Five humans, Jake, Marco, Cassie, Rachel, and Tobias, and one alien, Aximili-Esgarrouth-Isthill , obtain the ability to morph into any animal they touch. They name...

series, written by K.A. Applegate. It is narrated by Ax

Aximili-Esgarrouth-Isthill

Aximili-Esgarrouth-Isthill is a fictional character from the sci-fi book series Animorphs.-Biography:Aximili is a young Andalite who becomes stranded on Earth when the Andalite Dome Ship GalaxyTree is shot down by Yeerk fighters...

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The inside front cover quote is, "Ax is about to bug out...." The front cover quote is, "Change a little. Change a lot. Just change...."

Plot summary

The Animorphs discover that Hewlett Aldershot the Third has been run over by Controllers and is being kept secretly in a hospital where he is heavily guarded. He has a very high job in the government. Since he cannot be infested while in a coma

Coma

In medicine, a coma is a state of unconsciousness, lasting more than 6 hours in which a person cannot be awakened, fails to respond normally to painful stimuli, light or sound, lacks a normal sleep-wake cycle and does not initiate voluntary actions. A person in a state of coma is described as...

, Visser Three acquires his DNA in hopes of impersonating him to eventually acquire an even more senior official. They decide to morph mosquitoes with the theory that they can acquire him by sucking his blood without being in their natural forms where the Yeerk guards might notice them. While they are doing it, they are transported to Z-Space when their extra mass is caught in the slipstream of an Andalite ship heading for the Leera where there is a Yeerk invasion underway. Right before they suffocate, they are rescued and taken aboard. Once in the ship, Ax "betrays" the Animorphs by following the captain's orders. The group is told to stay calmly in a room while the Andalites do all the work. Unfortunately, the commander of the ship is a traitor. He attacks all the tripulation in the bridge but Ax. However he can do nothing to defeat him. That's when Ax alerts the Animorphs but they reveal to Ax that they are already in the room. Cassie distracts the captain and Ax defeats him. As the ship is about to be taken by the Yeerks, the second in command tells them to leave the ship and he blows it up. The Animorphs head across the major landmass of Leera

Leera

Leera is a fictional planet in the Animorphs series of books. Leera is a mostly aquatic planet, home to the Leerans, a psychic, amphibian race resembling frogs...

 to try to find friendly Andalites. Tobias mysteriously disappears and the rest go over to the ocean following Ax's idea- who promised that now on he will only take Jake's orders-. Rachel disappears and the rest meet some Leerans whom they acquire. Then they get told that the Andalites have planted a bomb to explode the continent- as Ax had suspected- but that they need to go to activate it and Cassie disappears. Marco disappears and they meet a Leeran-Controller who reads their minds and discovers their plans, alerting the Yeerks. When they get to the bomb, Jake disappears leaving Ax alone. He activates the bomb but a bunch of armed Hork-Bajir appear to disarm it. The Hork-Bajir fires at him but he disappears right before the beam hits him. The bomb goes off right after he disappears. Somehow all the Animorphs arrived back to the hospital where they were before they got sucked into Z-Space. in that precise moment the person in coma awakes and tries to kill Ax-mosquito. So the Animorphs no longer need to morph him.

Once in the mall Ax explains that as they were sucked to the Z-Space all together, they obviously had to return all together.

Morphs

Morpher	Morphs acquired	Morphs used
Jake Jake Berenson Jake Berenson is a fictional character and one of the main protagonists from the science-fiction book series Animorphs, written by K. A. Applegate. Until the penultimate book of the series, his last name was never revealed, and he was known only as Jake...	Mosquito Mosquito Mosquitoes are members of a family of nematocerid flies: the Culicidae . The word Mosquito is from the Spanish and Portuguese for little fly... , Leeran Leeran The Leerans are a fictional race of aliens from the Animorphs series by K.A. Applegate. They are described as a yellow amphibian species with tentacles for arms that resembles a manta ray or frog...	Seagull, Peregrine Falcon Peregrine Falcon The Peregrine Falcon , also known as the Peregrine, and historically as the Duck Hawk in North America, is a widespread bird of prey in the family Falconidae. A large, crow-sized falcon, it has a blue-gray back, barred white underparts, and a black head and "moustache"... , Mosquito, Housefly Housefly The housefly , Musca domestica, is a fly of the suborder Cyclorrhapha... , Bat Bat Bats are mammals of the order Chiroptera "hand" and pteron "wing") whose forelimbs form webbed wings, making them the only mammals naturally capable of true and sustained flight. By contrast, other mammals said to fly, such as flying squirrels, gliding possums, and colugos, glide rather than fly,... , Hammerhead Shark Hammerhead shark The hammerhead sharks are a group of sharks in the family Sphyrnidae, so named for the unusual and distinctive structure of their heads, which are flattened and laterally extended into a "hammer" shape called a "cephalofoil". Most hammerhead species are placed in the genus Sphyrna while the... , Leeran
Rachel Rachel (Animorphs) Rachel is a fictional character from the sci-fi book series Animorphs. Her full name is never explicitly mentioned in the books, but her relation to her cousin Jake Berenson through their fathers makes it most likely to be Rachel Berenson, if it was never changed or hyphenated.-Biography:Before the...	Mosquito Mosquito Mosquitoes are members of a family of nematocerid flies: the Culicidae . The word Mosquito is from the Spanish and Portuguese for little fly...	Seagull, Bald Eagle Bald Eagle The Bald Eagle is a bird of prey found in North America. It is the national bird and symbol of the United States of America. This sea eagle has two known sub-species and forms a species pair with the White-tailed Eagle... , Mosquito, Housefly Housefly The housefly , Musca domestica, is a fly of the suborder Cyclorrhapha... , Bat Bat Bats are mammals of the order Chiroptera "hand" and pteron "wing") whose forelimbs form webbed wings, making them the only mammals naturally capable of true and sustained flight. By contrast, other mammals said to fly, such as flying squirrels, gliding possums, and colugos, glide rather than fly,...
Tobias Tobias (Animorphs) Tobias is a fictional character from the sci-fi book series Animorphs written by K.A. Applegate. His surname is never mentioned, but had the Ellimist not altered time in order to take his father, Elfangor-Sirinial-Shamtul, back to his old life, his full name would have been Tobias Fangor, the...	Mosquito Mosquito Mosquitoes are members of a family of nematocerid flies: the Culicidae . The word Mosquito is from the Spanish and Portuguese for little fly...	Mosquito, Housefly Housefly The housefly , Musca domestica, is a fly of the suborder Cyclorrhapha... , Bat Bat Bats are mammals of the order Chiroptera "hand" and pteron "wing") whose forelimbs form webbed wings, making them the only mammals naturally capable of true and sustained flight. By contrast, other mammals said to fly, such as flying squirrels, gliding possums, and colugos, glide rather than fly,... , human Human Humans are the only living species in the Homo genus...
Cassie Cassie (Animorphs) Cassie is a fictional character from the sci-fi book series Animorphs, written by K. A. Applegate. Her last name is never mentioned, although she referred to it as being "nice" in The Secret.-Biography:...	Mosquito Mosquito Mosquitoes are members of a family of nematocerid flies: the Culicidae . The word Mosquito is from the Spanish and Portuguese for little fly... , Leeran Leeran The Leerans are a fictional race of aliens from the Animorphs series by K.A. Applegate. They are described as a yellow amphibian species with tentacles for arms that resembles a manta ray or frog...	Seagull, Osprey Osprey The Osprey , sometimes known as the sea hawk or fish eagle, is a diurnal, fish-eating bird of prey. It is a large raptor, reaching more than in length and across the wings... , Mosquito, Flea Flea Flea is the common name for insects of the order Siphonaptera which are wingless insects with mouthparts adapted for piercing skin and sucking blood... , Housefly Housefly The housefly , Musca domestica, is a fly of the suborder Cyclorrhapha... , Bat Bat Bats are mammals of the order Chiroptera "hand" and pteron "wing") whose forelimbs form webbed wings, making them the only mammals naturally capable of true and sustained flight. By contrast, other mammals said to fly, such as flying squirrels, gliding possums, and colugos, glide rather than fly,... , Hammerhead Shark Hammerhead shark The hammerhead sharks are a group of sharks in the family Sphyrnidae, so named for the unusual and distinctive structure of their heads, which are flattened and laterally extended into a "hammer" shape called a "cephalofoil". Most hammerhead species are placed in the genus Sphyrna while the... , Leeran
Marco Marco (Animorphs) Marco is a fictional character from the sci-fi book series, Animorphs, written by K. A. Applegate. His last name is never mentioned.-Biography:...	Mosquito Mosquito Mosquitoes are members of a family of nematocerid flies: the Culicidae . The word Mosquito is from the Spanish and Portuguese for little fly... , Leeran Leeran The Leerans are a fictional race of aliens from the Animorphs series by K.A. Applegate. They are described as a yellow amphibian species with tentacles for arms that resembles a manta ray or frog...	Seagull, Osprey Osprey The Osprey , sometimes known as the sea hawk or fish eagle, is a diurnal, fish-eating bird of prey. It is a large raptor, reaching more than in length and across the wings... , Mosquito, Housefly Housefly The housefly , Musca domestica, is a fly of the suborder Cyclorrhapha... , Bat Bat Bats are mammals of the order Chiroptera "hand" and pteron "wing") whose forelimbs form webbed wings, making them the only mammals naturally capable of true and sustained flight. By contrast, other mammals said to fly, such as flying squirrels, gliding possums, and colugos, glide rather than fly,... , Hammerhead Shark Hammerhead shark The hammerhead sharks are a group of sharks in the family Sphyrnidae, so named for the unusual and distinctive structure of their heads, which are flattened and laterally extended into a "hammer" shape called a "cephalofoil". Most hammerhead species are placed in the genus Sphyrna while the... , Leeran
Ax Aximili-Esgarrouth-Isthill Aximili-Esgarrouth-Isthill is a fictional character from the sci-fi book series Animorphs.-Biography:Aximili is a young Andalite who becomes stranded on Earth when the Andalite Dome Ship GalaxyTree is shot down by Yeerk fighters...	Mosquito Mosquito Mosquitoes are members of a family of nematocerid flies: the Culicidae . The word Mosquito is from the Spanish and Portuguese for little fly... , Leeran Leeran The Leerans are a fictional race of aliens from the Animorphs series by K.A. Applegate. They are described as a yellow amphibian species with tentacles for arms that resembles a manta ray or frog...	Seagull, Northern Harrier, Mosquito, Housefly Housefly The housefly , Musca domestica, is a fly of the suborder Cyclorrhapha... , Bat Bat Bats are mammals of the order Chiroptera "hand" and pteron "wing") whose forelimbs form webbed wings, making them the only mammals naturally capable of true and sustained flight. By contrast, other mammals said to fly, such as flying squirrels, gliding possums, and colugos, glide rather than fly,... , Hammerhead Shark Hammerhead shark The hammerhead sharks are a group of sharks in the family Sphyrnidae, so named for the unusual and distinctive structure of their heads, which are flattened and laterally extended into a "hammer" shape called a "cephalofoil". Most hammerhead species are placed in the genus Sphyrna while the... , Leeran
Visser Three Visser Three Visser Three, born as Esplin 9466 Primary and later known as Visser One, is a fictional character and the main antagonist of the sci-fi book series Animorphs, written by K.A. Applegate. He is the leader of the Yeerk forces on Earth, having inherited the planet from Edriss 562, who was Visser One at...	--	Human Human Humans are the only living species in the Homo genus... , Kafit Bird

In chapter 15, in the battle for control of the Ascalin, several of the Animorphs are hidden in fly and cockroach morphs. The book never specifically indicates which of them was what insect, except for Cassie, who was in flea morph.