Love, Lies and Liquor by M.C. Beaton

In ten words or less: Agatha joins James on romantic holiday, complete with body on beach.

Review: Agatha Raisin has convinced herself she is better off without her ex-husband, James Lacey. After all, she has her detective agency to keep her busy, and the meetings of the Carsley Ladies' Society. When James asks her to go on holiday with him, Agatha relents. The destination is a secret, but with visions of tropical beaches and other exotic sights--James is a travel writer--she backs bathing suits and sundresses.

When they arrive in Snoth-on-Sea, Agatha is not amused. The seedy resort town, remembered fondly by James from his childhood holidays, has seen better days. The hotel is barely habitable, and Agatha quarrels with an unpleasant woman in the dining room. When the body of the quarrelsome woman is discovered on the beach, Agatha is considered a prime suspect by the local police.
Why bother? Agatha Raisin is self-centered, outspoken, and vain. If you knew a person like her in real life, you'd run the other way when she heads in your direction. She's the boss from hell. But her ability to interfere in police investigations while alienating those around her make for entertaining reading. There are twenty two books in this series to date.