Mistaken Identity (Wynn Garrett Series #1) by Bruce A. Borders

The terrorism risk in American has reached an all-time high. Recognizing the need for an aggressive response, Homeland Security assigns Wynn C. Garrett to eliminate the threat of the Al Jahbid terrorist organization, by any means necessary. Believing he is a former Navy Seal, they expect him to be politically correct and follow reasonable guidelines of war. He turns out to be anything but reasonable. While he single-handedly exacts vengeance on the terrorists who target America, his questionable tactics are met with disapproval from his bosses, Thomas Wardahl and Richard Scorby. Their attempts to curb his reckless behavior are unsuccessful and Wynn Garrett is well on his way to completing the assignment before they discover his true identity.