What begins as a domestic drama about an American couple relocating to Europe takes a sharp turn into spy-thriller territory. When her husband, Dexter, lands a high-paying job in Luxembourg, Kate Moore gladly quits her secret life as a CIA agent to reinvent herself as an expat housewife. But she has to put her espionage skills to use again when another American couple arrives in town and tells her that Dexter might have a secret life of his own. After a slow start, Expats eventually reaches its full, bombshell-a-minute pace. And Pavone creates a fascinating, complicated hero in Kate Moore. B+

