Protect and defend, by Vince Flynn

The one bad thing about reading a series featuring a continuing character like Mitch Rapp, CIA, is that sometimes a book ends without a satisfying resolution; you have to read the next book to see what happens. Flynn's last book, Act of Treason, ended that way, but the good news is that this book begins with a great resolution. Mitch works for the CIA but his boss, Irene, and the President both depend on him for his knowledge of Iraq and Iran. When Iran's nuclear power plant implodes and they blame the US and Israel, Mitch works to bring the warring parties together. I learn a lot from this series.