Lady Rample and the Parisian Affair — Shea MacLeod

It's springtime in London, and Lady Rample is ready for a new adventure. When Aunt Butty declares she wants to be a novelist and must move to Paris posthaste (because novelists live in Paris), Lady Rample decides to go with her. Especially since her paramour, Hale Davis, is also headed to Paris for a jazz gig. She might as well join in the fun. She's been in Paris for less than a week when she stumbles across the body of a former Harlem Hellfighter. Next thing she knows, she's embroiled in the hunt for a stolen diamond and in the sights of a cold-blooded killer. Book 9 in the popular, feel-good Lady Rample Mysteries set (mostly) in 1930s London.