Overview
The Solution is the 22nd book in the Animorphs series, written by K.A. Applegate, published first on January 1, 1998, and then released in October 1998. The book is narrated by Rachel. It is the last book in the David trilogy.
Plot summary
After having a bizarre dream, Rachel is woken by Ax, who explains Jake's express orders to summon her. That decision bothers her, but her qualms are silenced when Ax breaks her the news of Tobias's probable death. Rachel is willing to do what Jake expected her to do. They first fly to the mall to try and help Jake, only to be ambushed by David in his lion morph. Rachel escapes the attempt on her life, and David retreats. Later, Cassie arrives with her family to tend to Jake, who was injured in his fight with David at the end of the previous book, so Rachel and Ax decide that Jake will be all right in their hands. They fly to Marco's house. Ax tries to fly through his window, but is promptly knocked out by David disguising as Marco's morph. Rachel allows David to morph to golden eagle, and leads him on a chase through town. Rachel plans to lure him into the power lines, electrocuting him, but David outmaneuvers her and almost kills her. David is attacked by a hawk, which turns out to be Tobias, with David thinking that it is a natural red-tailed hawk.
Relieved that Tobias is alive, the Animorphs plan how to trap the traitor. At school, they're surprised, though, when David, in Marco's body, demands the Escafil device, the blue box, threatening to betray their identities to the Yeerks. Cassie realizes that David wants the Escafil device to ransom his parents from the Yeerks and tries to reason with him, telling him it won't make Visser Three give his parents back. However, her attempt is to no avail. Making no progress, David leaves, with Rachel in pursuit. In a secluded spot on the school grounds, Rachel tells him that even if David betrays them, she'd still have time to make short work of him and his parents before she would be silenced by the Yeerks. David tries to attack her, but she pins him down. Having made her threat, she releases him. Soon after, Rachel becomes enraged with the way Jake is manipulating her violent tendencies.
The Animorphs formulate one final attempt to doom the Yeerks' plan to make Controllers of some of the G8 leaders. They morph dolphins and travel to the shore of the Marriott resort.
From Wikipedia (CC BY-SA 4.0).