Date: March, 1982 — Book
This is the classic tale of the little black bag, where a number of travelers carrying identical handbags somehow end up carrying the wrong luggage. It's been a comic staple for years, and runs from the movie Oscar to the children's book Babar. In this case, the "handbag" is a hatbox, and the heist is a fortune in jewelry, secreted away because the insurance would be too costly for a small museum to afford.
The jewels are secret, that is, until an inquisitive little girl opens the hatbox in front of all and sundry, including a potential thief... and a mixup at customs means that the search is on... a search that could turn out to be deadly.
Short but fun, and ridiculous in many respects, but that's what this sort of novel is for.