Applegate Katherine Alice. The Animorphs 19. The Departure

The Animorphs attack the Hork-Bajir bodyguards at a Sharing meeting. The very second Jake ordered his team to break off, Cassie tore the throat out of a Hork-Bajir. Cassie, ridden with guilt, runs away. She senses someone watching her, but doesn't pay much attention. She demorphs, and has a nightmare (a scene from Megamorphs #2). She wakes up, and begins scrubbing her teeth and gums until they bleed as she had found a piece of Hork-Bajir flesh stuck in her teeth. The next day, Cassie meets the others at her barn. She explicitly declares that she's fed up with all the violence, and quits being an Animorph. The others are disgusted with her scrupulous behaviour, and brand her a hypocrite; Rachel in particular declares their friendship over, informing Cassie that she basically said the world can die so long as Cassie doesn't end up becoming as ruthless as Rachel. Marco makes a sarcastic remark about Cassie "going back to playing with her animals". Cassie then tells them that her father lost the much-needed funding to keep the Rehabilitation Clinic open. A distraught Cassie goes on a horse ride to calm her nerves.Cassie suddenly spots a girl being chased by an angry bear. Cassie pursues them, but is knocked off her horse, and falls into the icy river. When she wakes up, she realizes she'd been saved by the little girl. The girl introduces herself, calling herself Karen. Karen tries to force Cassie to reveal her true identity. Cassie laughs and pretends the girl is mistaken. Soon it is apparent that the girl is a Controller, Aftran 942, watching her own father, the president of UniBank. It also becomes apparent that Cassie had killed Aftran's brother Estril
731. They are both lost in the forest, and Cassie knows that a leopard that escaped from a private zoo is lurking about. During their time together, Cassie reveals her identity when she fends off an attack by the leopard.Animorphs is an English language science fiction series of young adult books written by K. A. Applegate and published by Scholastic. It is told in first person, with all 6 main characters taking turns narrating the books through their own perspectives. Horror, war, dehumanization, sanity, morality, innocence, leadership, freedom, and growing up are the core motifs of the series.The story revolves around five humans, Jake, Marco, Cassie, Rachel, and Tobias, and one alien, Aximili-Esgarrouth-Isthill (nicknamed Ax), who obtain the ability to morph into any animal they touch. Naming themselves "Animorphs" (a portmanteau of "animal morphers") they use their ability to battle a secret alien infiltration of Earth by a race called the Yeerks. The Yeerks are a parasitic race of aliens resembling large slugs that take humans as a host by entering and merging with their brain through the ear canal. The Animorphs fight as a guerilla force against the Yeerks, led by Visser Three, and their program to take over the human race. Morphing into animals allows them to battle the various armies of aliens that the Yeerks use, but it also protects their identities. As far as the Yeerks know, only Andalites like Ax have the ability to morph, and if they knew that the Animorphs were mostly human they would be able to easily find out who they are. Protecting their identities becomes more and more difficult as the series goes on because though someone with the ability to morph can change into any animal that they touch, they can only stay in a morph for two hours or they will permanently become that animal. Throughout the series, we see how the war affects the characters in different ways, mentally and physically.