No way home - Peter Spiegelman

After the slaying of his wife, New York private investigator John March made an uneasy peace with grief and guilt. But his truce came at a price: a life of solitude and rigid self-discipline. It was a hard bargain, but one he was willing to make - until he met Jane Lu.

Brilliant and beautiful, Jane offered March a chance at a larger life. But with that hope came a terrible reminder of how fragile happiness can be - Jane was swept up, and nearly swept away, in the violent currents of one of March's jobs.

March decided to stay clear of danger from then on, but soon afterwards what seems a cut and dried missing persons case becomes something more deadly There is more than one person looking for the missing man - someone who doesn't want March getting too close,and who will put March, and all he holds dear, in the cross-hairs again.