The Ambler warning

Summary: On Parrish Island, a resticted island off the coast of Virginia, there is a little known and never-visited psychiatric facility. The government keeps in 'deep storage' former intelligence employees who psychiatric state make them a security risk to their own government. One of the these employees, former Consular Operations agent Hal Ambler, is so dangerous that he is in isolation, kept heavily medicated and closely watched. But there's one critical difference between him and the other patients, Ambler isn't crazy. With the help of a sympathetic nurse, Ambler manages to first clear his mind of the drug-induced haze and then executes a daring escape. On the loose and barely one step ahead of the retrieval teams sent after him, he is out to discover who had him stashed in the psychiatric hospital and why. But the world he returns to isn't the one he so clearly remembers - friends and longtime associates don't recognize him, and there are no official records of any person named Hal Ambler. With no resources and his unknown enemies closing in on him, Ambler has to uncoverthe truth of who he was and figure out what it is about him - remember what he knows - that makes him such a danger that someone is willing to risk everything to see him dead.