Death of a Dormouse — Patrick Ruell

A woman exposes her dead husband's lies in a thriller by the “consistently excellent” author of the Dalziel and Pascoe mysteries (The Times, London).
 
Best known for his Dalziel and Pascoe novels, which were adapted into a hit BBC series, Reginald Hill proves himself to be a “master of . . . cerebral puzzle mysteries” in his stand-alone thrillers as well -- now available as ebooks (The New York Times).
 
When her husband, Trent, dies in a car accident, shy and agoraphobic Trudi Adamson is unprepared to face the world. She has no choice. After twenty-five years of marriage, she's just discovered that her life has been a lie. Despite Trent's prosperous career he's left Trudi penniless. He'd quit his job without telling her, maintained a rural hideaway, had a possible lover in Vienna, a Swiss bank account, and traveled the world under numerous aliases. But Trudi's not the only one following a dead man's trail. So are Trent's dangerous enemies. Both hunter and hunted, Trudi must go from timid and terrorized mouse to fearless investigator if she's to discover the truth in the deadly shadows of her husband's secret life.