Only the Good Spy Young
Ally Carter
 : For earlier events, see: Don't Judge a Girl by Her Cover. The story starts with student Cammie (Cameron Morgan), still enrolled at Gallagher Academy, already in London with Bex and her parents. Cammie now has strict security surrounding her because the Circle of Cavan, a terrorist group, is after her. While at an ice skating rink, she talks briefly with Zach, and he asks her if she has seen Joe Solomon. After Zach leaves, the lights go out, and Cammie is grabbed by Mr. Solomon, who tells her to run. They end up on the Tower Bridge, where Bex's parents reveal that Mr. Solomon was the threat. She demands answers but he only makes her promise to "follow the pigeons" before jumping off the bridge and escaping. She is interrogated two hours later by an MI6 agent (who is later revealed to be Edward Townsend) and is released. While in a "safe house" with Bex's family, her Aunt Abby comes to visit. Cammie is appalled and upset that her mother did not come to comfort her. After she and Bex eavesdrop on part of the conversation between the Baxters and Aunt Abby, they confront the adults. They learn that Joe Solomon has been a member of the Circle of Cavan since he was sixteen. The girls return to the Gallagher Academy, but things have changed. All of the secret passageways (except one leading to the kitchen) have been blocked. Security is much higher than before. When the girls reach their room, the MI6 agent from London (Townsend) was there. At dinner, Professor Buckingham announces that Agent Townsend would be the new CoveOps teacher. They quickly figure out that Agent Townsend is not interested in teaching at the school, but requested the job to help him find out more about Joe Solomon. They drugged him with an experiment Liz developed and interrogated him, and they found out that Mr. Solomon killed Cammie's father. Cammie's mother returned to the school shortly afterward. The roommates decided to try to find out what Mr. Solomon meant by saying "follow the pigeons". They find out there is an old carrier pigeon room, and they go there where they find a message telling Cammie to go to the gazebo. They decide to send Macey instead and discover Zach is the one that sent the message. He asks to see Cammie, and she goes down to see him. He tells her to go the Sublevels and that there is a journal there that will help them understand everything. He also reveals that Mr. Solomon was the one who rigged the alarms in the sublevels so no one could go down. While the girls try to figure out how to get down to the Sublevels, Cammie is having trouble trusting Zach, despite all they had been through. Agent Townsend takes them on a "field trip" to an amusement park, and he gives all the girls assignments. Bex is reluctant to leave Cammie, but Cammie argues that her mother would not have let her come unless it was safe. Cammie proceeds to tail an employee for her assignment. While following him into a building, she finds a rugged, tired-looking Joe Solomon. She yells at him and tells him he got her father killed, to which he wearily replies, "I know." Agents show up and Cammie discovers that it was a plot to capture Joe Solomon. She runs to a hill and finds Zach there. She asks him why Mr. Solomon would walk right into a trap, and he tells her that Mr. Solomon would do anything to keep her safe. He kissed her forehead and ran off. Three weeks later, the girls are ready to get the journal. They work their way through Sublevel Two, with some difficulty, but finally get to the place the book is supposed to be. While Liz is hoisted up to get the book, Cammie and the other roommates become aware that there is someone else trying to break in. They assume it is Agent Townsend (we later learn it was Rachel Morgan), and get out as soon as possible. The book was written in code but the girls find the key. It turns out that the journal belonged to Cammie's father, Matthew Morgan. The journal explains how Matthew Morgan and Joe Solomon tried to bring down the Circle of Cavan. Operative Morgan went missing on the way to Greece. Solomon blames himself because that was supposed to be his mission, and felt it should have been him. A couple nights later Zach sneaks into Cammie's room and wakes her up. They take a walk and she asks him why the Circle would break Joe Solomon out of a CIA prison if he was working against them. Zach responds saying, "They weren't doing him a favor". Cammie demands more answers, but Zach will not give her any. Her furious roommates show up and try to get answers from him, too. Cammie suggests a plan to go get the other notebook, the one that Joe Solomon wrote, from Blackthorne. Then, Cammie's mother arrives, and she says she will help them. While in the car, Zach tries to talk to Cammie, but she ignores him. They pull over the van, and we learn that Bex's parents and Aunt Abby are there to protect Cammie. From there, the girls and Zach walk to Blackthorne.Cammie finds out that it was her mother who had tried to get the journal. They had heard her. After going through its various defenses, they learn Blackthorne's cover: it's a school for juvenile delinquents. Macey, Bex, and Liz go shut down the defenses and keep an eye on security, leaving Zach and Cammie alone to complete the mission. Zach asks Cammie to stay, wanting her to be safe, but she responds by kissing him and asks where they are going. "The Tombs," is his reply. Zach and Cammie go out to the woods and find the entrance to "The Tombs". The make their way through a complicated maze and Zach reveals that Blackthorne is a school for assassins. They finally find the place where Joe Solomon's journal is hidden and retrieve it. As they are about to leave, they hear people coming and hide. They see several members of the Circle of Cavan, including the woman who tried to abduct Cammie from the roof in Boston last summer, and Joe Solomon. The explosives on the walls show that Mr. Solomon brought the members here to kill them and himself in the process. A man finds Cammie and Zach and brings them to the woman. We learn that she is Zach's mom, and Cammie is horrified. After a quick fight Zach manages to get a gun and take aim at the explosives. Cammie says "NO!" but cannot stop Zach, so she begins to run. She thought she had made it out but ran into Zach's mother, and we learn that she was a Gallagher Girl. She tries to convince Cammie to come to her by telling her that her father is still alive. Instead, Cammie jumps off the side of the cliff to get away, thinking that both Zach and Mr. Solomon are dead. They find her and take her back to the school's infirmary. After having her explain what happened, Agent Townsend takes her to a man who is bandaged from head to toe. We know it is Mr. Solomon, but according to Agent Townsend, Mr. Solomon is "dead". He hands her Mr. Solomon's journal and walks away. Cammie is later talking with her mom and we learn that Zach will stay the rest of the semester at the Gallagher Academy and that Mr. Solomon might not make it. Cammie gives Zach the journal before being ambushed by her distressed roommates. Cammie decides she will not be able to go to her grandparents' ranch this summer because it is too dangerous. One day Cammie and Zach talk, and Zach asks her to run away with him. She kisses him and says she cannot, to which he replies "I know". Soon after, it is revealed that she is in fact going to run away alone, promising she will have answers when she gets back.