A Motive For Murder follows the adventures of 84-year old Auntie Lil and her stiff-upper-lip 55-year old nephew T.S. Hubbert as they track the killer of a well-known figure in the world of ballet. With the help of their friends, they must navigate both the cutthroat backstage of The Metropolitan Ballet and its cutthroat boardroom to track the killer. The book features Gray's trademark dry wit and marks the final book in the Hubbert & Lil mystery series by Katy Munger, writing as Gallagher Gray.