Agatha Raisin and the Murderous Marriage (Agatha Raisin, #5)

In her fifth outing, Agatha Raisin - the sometimes pushy, sometimes endearing heroine of Beaton's Cotswold village mystery series - has her marriage to next-door neighbour James Lacey disrupted by the startling appearance of her undivorced, long-thought-dead first husband, Jimmy Raisin. Matters go quickly from bad to worse when Jimmy is found murdered - and Agatha and James are the prime suspects.