The thrilling final installment of The Calculated Series!

Stefanie Ryland is a marine biologist whose life is going exactly to plan. She's worked her way up the corporate ladder to land her dream job at the Oceanic Exploration Group and has a fulfilling personal life. Not to mention, her older sister, Ree, is soon going to make her the world's greatest aunt. However, a surprise phone call from Ree forces Stefanie to reevaluate everything she thought she knew. Not only has her sister been secretly moonlighting for the FBI and CIA, but Ree has also helped thwart several dangerous attacks. And her team believes that Dmitri, the man behind the attacks, has made the OEG his next target.

For CIA Operations Officer Joey Pacelli, putting Dmitri out of play isn't just his job, it's unfinished business. When the CIA and the FBI ask Stefanie Ryland to help them take Dmitri down, Joey travels to San Francisco to protect her. Teaming up with Stefanie is the perfect chance for Joey to beat his old nemesis at his own game. There's just one problem – Dmitri is playing by an entirely new set of rules.