Heart Strike: A Linda Darby Mystery, Book 4 (Unabridged‪)‬

An international thriller: 

The President of the United States assigns Ryan Testler a cloak-and-dagger mission to Europe in pursuit of support for his new doctrine dealing with the Middle East. Linda Darby accompanies Ryan to create the look of a couple of tourists. That cover story fails. Meanwhile, back in Washington, D.C., a lone terrorist, after four years as a sleeper, is activated. He wants to complete his sworn duty and make his family in Egypt proud. At the same time, his years in America as a sleeper have given him a different view of the country and its people. He struggles with this conflict as Ryan Testler leads the government's efforts to locate him before it’s too late.