The Last Thing I Remember by Andrew Klavan

Charlie went to bed with a grin, staring at the phone number Beth had written on the back of his hand that afternoon at school. Charlie woke up beaten, burned and cut, strapped to a chair in a room filled with torture devices....a year later. What happened in that year? The police say Charlie killed his best friend, was tried and went to prison only to escape a few months into his sentence. A stranger with a familiar face says Charlie's a Homelander, an American terrorist recruited by Islamic extremists. But Charlie knows he'd never murder anyone, nor would he do anything to hurt the country he loves. But even as he tries to recover his memories he has to also evade capture long enough to uncover - and stop - an assassination plot. Can he make it on time? Or will there be another death on his conscious?

This excellently paced book is a full-on action adventure mystery. Charlie is a likable character and readers will believe him and believe in him, even when the police don't. They'll also be clamoring for the next title, because the plot doesn't end when you turn the last page.