With more than a million Gallagher Girls books sold, a legion of fans have fallen in love with the New York Times best-selling spy-girl series, and the fifth book delivers the most nerve-wracking, high-stakes adventure yet. The last thing Cammie Morgan remembers is leaving the Gallagher Academy to protect her friends and family from the Circle of Cavan—an ancient terrorist organization that has been hunting her for over a year. But when Cammie wakes up in an alpine convent and discovers that months have passed, she must face the fact that her memory is now a black hole. The only traces left of Cammie's summer vacation are the bruises on her body and the dirt under her nails, and all she wants is to go home.

Once she returns to school, however, Cammie realizes that even the Gallagher Academy now holds more questions than answers. Cammie, her friends, and mysterious spy-guy Zach must face their most difficult challenge yet as they travel to the other side of the world, hoping to piece together the clues that Cammie left behind. It's a race against time. The Circle is hot on their trail and willing stop at nothing to prevent Cammie from remembering what she did last summer.

Cammie Morgan is back, and it's clear that her life hasn't calmed down since the events of I'd Tell You I Love You, But Then I'd Have to Kill You. At first, giddy anticipation is in the air. Gallagher Academy, Cammie's elite spy school, is hosting a visit from a covert training center for boys. Soon after the boys' arrival, though, everything goes dangerously awry when a series of security breaches are discovered at the academy. Worse yet, teenage agent-in-training Cammie is being blamed for the penetration. With the school's top-secret status at risk, the Gallagher Girls have to work quickly to save their beloved school.

Cammie Morgan is a student at the Gallagher Academy for Exceptional Young Women, a fairly typical all-girls school—that is, if every school taught advanced martial arts in PE and the latest in chemical warfare in science, and students received extra credit for breaking CIA codes in computer class. The Gallagher Academy might claim to be a school for geniuses, but it's really a school for spies.

Even though Cammie is fluent in fourteen languages and capable of killing a man in seven different ways, she has no idea what to do when she meets an ordinary boy who thinks she's an ordinary girl. Sure, she can tap his phone, hack into his computer, or track him through town with the skill of a real "pavement artist"—but can she maneuver a relationship with someone who can never know the truth about her? Cammie Morgan may be an elite spy-in-training, but in her sophomore year, she's on her most dangerous mission—falling in love.

Over the course of nine novels, Tom Clancy’s “genius for big, compelling plots” and his “natural narrative gift” (The New York Times Magazine) have mesmerized hundreds of millions of readers and established him as one of the preeminent storytellers of our time. Rainbow Six, however, goes beyond anything he has done before.

At its heart is John Clark, the ex-Navy SEAL of Without Remorse, well known from several of Clancy's novels as a master of secret operational missions. Whether hunting warlords in Japan, druglords in Colombia, or nuclear terrorists in the United States, Clark is efficient and deadly, but even he has ghosts in his past, demons that must be exorcised. And nothing is more demonic than the peril he must face in Rainbow Six.

Newly named the head of an international task force dedicated to combating terrorism, Clark is looking forward to getting his teeth into a new mission, but the opportunities start coming thicker and faster than anyone could have expected: an incident at a Swiss bank, the kidnapping of an international trader in Germany, a terrible raid on an amusement park in Spain.

Each episode seems separate, discrete, yet the timing disturbs Clark. Is there a connection? Is he being tested? With the help of his close associates, executive officer Alistair Stanley and strike team leaders Domingo Chavez and Peter Covington, Clark tries to figure out where all this activity is heading, but there is no way to predict the real threat: a group of terrorists like none the world has ever encountered, a band of men and women so extreme that their success could literally mean the end of life on this earth as we know it.