Hanged For a Sheep — Frances Lockridge; Richard Lockridge

Mrs. North must protect her aunt from being poisoned -- whether she likes it or not

Pamela North has never worried about making sense. When she has a thought, she expresses it, and if no one in the room knows what she's talking about, it's no trouble to her. While Mrs. North's unique style of thought can make her a challenging conversational partner, it also makes her one of the finest amateur sleuths in New York City. But no matter how sharp her wit, she can't pin down Aunt Flora. An indomitable old woman, shaped like a snowman and just as icy, Flora is convinced that someone is trying to slip her arsenic, and she'll be very cross if her niece can't stop the culprit before he succeeds.

Aunt Flora stubbornly refuses to let Pamela call in the police, until a suspicious dead body forces them to ask the opinion of Lt. William Weigand. It's a screwy mystery, and that means it's perfect for Mrs. North.

Hanged for a Sheep is the 5th book in the Mr. and Mrs. North Mysteries, but you may enjoy reading the series in any order.