"I'd Tell You I Love You, But Then I'd Have to Kill You" by Ally Carter is a novel about a sophomore girl who attends spy school. When Cammie meets Josh on a routine mission, she and her friends decide to investigate him which leads to Cammie's entrance into the world outside of Gallagher Academy. However, when her worlds collide, Cammie is forced to decide who she really is. "I'd Tell You I Love You, But Then I'd Have to Kill You" is an entertaining novel about a teenage girl living a double life as a spy and as a normal girl in love with a normal boy.

Cammie is excited to begin her sophomore year at Gallagher Academy, a spy school disguised as a snooty boarding school for heiresses, especially since she gets to take Joe Solomon's Covert Ops class. This class will be the first time that she and her peers get to do anything like real spy work. On their first mission at the town carnival, Cammie is unnerved when Josh, a normal boy, notices her, despite the fact that she is a pavement artist and is never seen unless she wants to be. Since Gallagher Girls are disliked by the locals, Cammie claims she is homeschooled. When she finally tells her best friends, Bex and Liz, about Josh, the girls decide to investigate him by helping Cammie sneak out of school to pursue a relationship with him.

Cammie is nearly busted at the Fall Harvest Dance when Headmistress Morgan and Mr. Solomon join the festivities. When the Gallagher Girls go to town, Cammie hides as Josh's friend harass her classmate for fear of blowing her cover. Liz is furious that Cammie chooses Josh over her peers. After seeing Cammie walking with the Gallagher Girls, Dillon, Josh's best friend, confronts Cammie, and when she admits to attending Gallagher Academy, Cammie and Josh break up. As Cammie walks away from Josh, Mr. Solomon kidnaps her for her real-life Covert Ops final. Though Cammie escapes, the girls' mission is nearly blown when Josh arrives to save Cammie.

After the girls pass their final exam, Josh is taken back to Gallagher Academy where Headmistress Morgan tells him the truth about the school. Though Cammie's mom is disappointed in her daughter's lies, she is happy that Cammie is capable of love. Just as Cammie thinks that maybe she is allowed to be with Josh, he tells her to thank her mom for the tea, leaving it unclear whether he was given normal tea or memory-altering tea. Cammie decides to continue studying on the Covert Ops course. Alhough she does not know what next semester will bring, she knows that Bex, Liz, and Macey will be beside her.