Animorphs Books in Order

Trapped in the body of a red-tailed hawk, Tobias is pulled between his human past and powerful animal instincts. When the Yeerks threaten the others, he has to decide where, and with whom, he belongs.

Jake and four friends witness a dying alien crash to Earth and receive the power to morph into animals. As Yeerks quietly take over human hosts, the kids must begin a secret war before anyone knows they exist.

Cassie receives a mysterious cry for help from the ocean, leading the Animorphs into a dangerous underwater mission. Their search brings them closer to Ax, an Andalite survivor with vital knowledge of the war.

Marco spots his mother, long believed dead, and discovers she is tied to the Yeerk invasion. A risky mission into a shopping mall forces him to face the possibility that his family has become the enemy.

Rachel learns that her best friend's father may be controlled by a Yeerk. To find proof and attempt a rescue, she must infiltrate his home as a house cat without exposing the Animorphs' secret.

In this section of the Andalite prequel, Elfangor sees the brutal choices made by the warrior Alloran during the war against the Yeerks. The mission reveals how fear and duty can lead even heroes toward catastrophe.

Elfangor's journey reaches its most personal and painful stage as the Yeerk war follows him to Earth. Old loyalties, human lives, and the fate of an Andalite friend collide in a story that leads toward Animorphs.

Elfangor begins as a young Andalite cadet eager to serve his people. A dangerous mission with friends and superiors pulls him into the early Yeerk war, setting events in motion that will one day reach Earth.

Ax struggles to understand human life while the Yeerks face a crisis of their own. When he discovers what happens to starving Yeerks and their hosts, Ax must choose between Andalite duty and his new friends.

This prequel follows Elfangor before the events of The Invasion, from his Andalite training to his life-changing encounter with Earth. It reveals the history behind Tobias, Visser Three, and the morphing power.

A quiet weekend becomes a major crisis when the Animorphs encounter a mysterious alien power. Working together across shifting perspectives, they must uncover what the so-called gift really costs before it is too late.

Marco meets Erek, a peaceful android with a hidden connection to the war. To protect him and uncover a Yeerk plot, the Animorphs must decide whether a friend built to avoid violence can ever fight back.

Jake is captured and infested by a Yeerk, leaving him trapped inside his own mind. The other Animorphs must rescue their leader while Jake fights a private battle for control of his body.

Tobias gets a brief chance to become human again, reopening everything he has lost since the war began. His decision is complicated by the Animorphs' need for his help and by his growing bond with Rachel.

A morphing accident sends Jake and the others into an alternate version of their lives. With memories fading and time running out, they must find a way home before this dangerous new reality becomes permanent.

Rachel discovers that a strange allergic reaction is interfering with her ability to morph safely. As the Yeerks close in, she has to confront fears about losing control and leaving her friends unprotected.

Cassie uncovers a Yeerk plan that could harm thousands of unsuspecting people through an everyday product. Her animal knowledge is crucial, but saving lives may require choices that clash with everything she believes.

Rachel and the Animorphs finally find a way into the Yeerk Pool, but the mission goes badly wrong. Then a powerful alien offers them an impossible choice: flee Earth safely or stay and lose.

A time-travel accident strands the Animorphs in the age of dinosaurs. Far from home and surrounded by prehistoric danger, they must find a way back without changing the future they are trying to save.

Ax returns to an Andalite conflict when the Animorphs become involved in the Yeerk invasion of another world. Caught between loyalties, he must decide what kind of warrior he wants to be.

Cassie meets a Yeerk who is beginning to question the invasion, opening the possibility of peace in the middle of war. Helping her could save lives, but it could also put the entire Animorphs team at risk.

Jake and the Animorphs try to learn whether their newest ally can be trusted with the power to morph. The answer becomes urgent when the Yeerks move closer to discovering the group's identities.

Marco is drawn into a dangerous Yeerk operation that tests the team's trust in one another. To get out alive, the Animorphs must use a risky plan while Marco faces painful truths about his family.

The history of the Hork-Bajir invasion unfolds through Andalite, Hork-Bajir, and Yeerk perspectives. As a peaceful species becomes a target, unlikely allies fight to preserve freedom against the growing Yeerk Empire.

Tobias is pulled toward secrets about his family and his connection to Elfangor. As the Yeerks circle closer, he must face old wounds while helping the others protect a hidden refuge.

The crisis caused by the Animorphs' new recruit reaches its breaking point. Jake must lead a desperate mission to stop a threat from within, knowing that every available solution comes with a terrible cost.

A tiny alien race with enormous egos traps the Animorphs in an insect-sized disaster. Shrunk and separated from their normal strengths, the team must survive a bizarre threat without losing sight of the larger war.

The Animorphs find a powerful new source of morphing technology, but they are not the only ones looking for it. Their attempt to secure it brings an unpredictable new human into the secret war.

Rachel follows a trail into the underground world of the Yeerk invasion, where a new threat is spreading through ordinary human life. Her instincts make her a fierce fighter, but they also make restraint difficult.

The Animorphs are drawn into a strange mission involving an alien threat they do not understand. With the usual rules of the war turned upside down, the team must adapt before their confusion becomes a fatal weakness.

The Animorphs discover that the Yeerks are building something hidden beneath the ocean. Jake leads the team into unfamiliar water, where new morphs and a deadly underwater base make every mistake harder to survive.

A lost Andalite message sends the Animorphs after information that could change what they know about Elfangor and the war. Their search leads into danger, betrayal, and secrets that have waited years to surface.

The Yeerks make a move against a high-profile gathering, forcing the Animorphs into a complex attack plan. Jake has to balance secrecy, speed, and the lives of people who have no idea a war is underway.

Jake suspects that the Yeerks are building a new kind of plot around the people closest to the Animorphs. To stop it, the group must investigate quietly while fear makes trusting anyone harder than ever.

An unsettling new enemy turns ordinary people into test subjects, and the Animorphs are drawn into a fight they barely understand. Their mission asks how much they can trust their senses when bodies and minds are changing.

Ax finds himself exposed to a side of human life that is confusing, funny, and dangerous. When a Yeerk plan threatens to reveal the Animorphs, he must use his outsider's perspective to help save them.

The Animorphs head into freezing territory to investigate a Yeerk operation with global consequences. Marco's jokes cannot hide the danger as the team faces brutal weather, hungry predators, and a threat to Earth itself.

You become a new Animorph recruit just as the Yeerk invasion threatens to close in. Choose your morphs and missions carefully, because every decision can lead to escape, disaster, or a very strange ending.

Tobias is captured by the Yeerks and subjected to a cruel attempt to break his will. Cut off from the others, he must hold on to his identity while the Animorphs search for a way to reach him.

A mission at sea strands the Animorphs in unfamiliar waters, where strange creatures and an isolated community hide a disturbing secret. The team must adapt quickly when their usual enemies are not the only danger.

Cassie is pulled into the history of the Hork-Bajir and an old Andalite promise. To help a free Hork-Bajir community survive, she must untangle a conflict that began long before the Animorphs were born.

A Yeerk offers the Animorphs a proposal that could change the terms of their secret war. Cassie and the others must decide whether this apparent opening is a real chance for peace or an elaborate trap.

Marco's past catches up with him when his mother becomes central to a deadly Yeerk power struggle. A family reunion turns into a dangerous mission that reveals how personal the war has become.

A morphing accident splits Rachel into two separate versions of herself. One has her caution, the other has her rage, and the Animorphs need both sides working together before the Yeerks take advantage.

Cassie is infected with a dangerous illness while the Yeerks close in on the team's weaknesses. As the others race to help her, Cassie must fight to hold on to herself and protect the people she loves.

Visser One tells her own story while facing trial before the Yeerk Empire. This companion novel reveals the invasion from inside the enemy ranks, including the ruthless politics and personal history behind Earth’s conquest.

The Animorphs are thrown into an alternate timeline where the Yeerk invasion developed very differently. To restore their own world, they must survive a reality that shows how much worse the war could have been.

The arrival of new Andalite forces should mean hope, but their plans do not match what the Animorphs expect. Ax is caught between his people and his friends as Earth becomes another battlefield in a larger war.

Ax takes on a dangerous human identity to infiltrate the Yeerks from within. The closer he gets to their plans, the harder it becomes to know whether the disguise is protecting the Animorphs or trapping him.

Tobias investigates a Yeerk operation involving animals, land, and a plan meant to distract the Animorphs. His connection to the natural world gives him an advantage, but it also leaves him deeply exposed.

Before he became the powerful Ellimist, he was Toomin, a curious being shaped by games, survival, and loss. This cosmic companion story traces how he became involved in the struggle over Earth.

Jake is shown a possible future in which the Yeerks have won and he has become someone unrecognizable. The vision forces him to question the sacrifices he is making as leader of the Animorphs.

The Animorphs investigate a new threat hiding in plain sight, one that could expose their identities and end their resistance. Tobias takes the lead as the team learns that danger can wear an ordinary face.

Rachel and Marco take elephant morphs into a dangerous mission involving captive animals and Yeerk schemes. Their very different reactions to the crisis test their friendship and their willingness to take risks.

The interactive Animorphs adventure continues with fresh paths through the secret war. You decide whom to trust, which animal to become, and how to survive when the Yeerks are always one choice behind you.

Rachel faces a threat that pushes her toward the part of herself she most fears. As the Yeerks and stranger forces close in, she must decide whether being ruthless is the same as being strong.

Jake finds unexpected strength in a story from his family's past while the Animorphs face a growing Yeerk threat. Two generations of resistance show how courage can survive even when the odds look hopeless.

Rachel faces the return of a powerful enemy who knows exactly how to exploit her anger. The fight becomes intensely personal as she is tempted by power that could make winning easier, and make her someone else.

Marco learns a devastating truth about his mother and the Yeerk leadership. With the invasion escalating, he has to decide how far he is willing to go to save his family and stop the enemy.

Tobias takes on a morph that brings him frighteningly close to the Yeerks' world. His mission becomes a test of empathy and survival as he learns how easily hunger and fear can overwhelm a person.

Cassie is swept into an unexpected encounter with a stranded alien warrior and a battle that does not belong to her time. To survive, she must rely on compassion as much as courage.

Rachel's reputation as the group's fiercest fighter becomes a problem when a mission demands patience and control. She has to confront what the war is turning her into before her own strength becomes a weakness.

Marco investigates a Yeerk project that reaches into a vulnerable human community. His humor and practical instincts are tested as the team uncovers a plan that makes the hidden invasion harder to ignore.

Jake leads the Animorphs into an open, all-or-nothing strike against the Yeerks. The secret war is ending, but victory will require choices that reshape the team and reveal the true cost of leadership.

The Animorphs face the final battle for Earth as the Yeerk invasion can no longer stay hidden. Told through the whole team, this ending follows the survivors into a future changed forever by war.

Ax is forced to weigh Andalite loyalty against the people he has fought beside on Earth. As the final conflict approaches, he learns that duty can demand sacrifices no one is ready to make.

Cassie faces an impossible mission involving a Yeerk weapon and innocent lives. Her refusal to treat people as expendable puts her at odds with a plan that may be the Animorphs' best chance to strike back.

Jake and his friends discover a hidden alien invasion after meeting a dying Andalite. This graphic adaptation brings their first morphs, first losses, and first desperate mission to life in full color.

Rachel uses her cat morph to investigate whether her best friend's father has become a Yeerk host. This graphic adaptation follows her dangerous attempt to uncover the truth without exposing the Animorphs.

Cassie hears a desperate signal from beneath the ocean and leads the Animorphs into a deadly underwater search. This graphic adaptation introduces Ax and expands the team's understanding of the alien war.

Marco discovers that his supposedly dead mother may be alive and involved with the Yeerks. This graphic adaptation turns a mall mission into a personal confrontation with the invasion's most painful secrets.

When Jake is infested by a Yeerk, he must fight from inside his own mind while his friends try to save him. This graphic adaptation raises the stakes of the Animorphs' secret war.