In “The Unbreakable Code”, by Jennifer Chambliss Bertman, Emily and James try to break the Unbreakable Code, which they think their teacher, Mr. Quisling, is also trying to solve and might be working with someone else. While Emily and James try to solve the Unbreakable Code, sudden fires are occurring each time they get closer to finding out who Mr. Quisling is working with. Emily and James are trying to solve the code, while they try to find out who Mr. Quisling is working with and who he/she is.