A Miss Marple Nightcap: Strange Jest by Agatha Christie

You'd be forgiven for mistaking the bucolic English country estate
where this story is set for the Borscht Belt of upstate New York,
because this Miss Marple yarn (see what we did there?) is pretty
darn funny. Poor Edward and Charmian had no idea what they were in
for when Jane Helier (!!) recommended they consult with the very
best of amateur sleuths in the attempt to recover a modern-day
buried treasure. Take cover, because the hijinks are flying fast!