A second appearance by Munroe Tallant (Tallant for Trouble, 1976), the huge, black, witty Commissioner of Police for the Flamingo Islands somewhere in the Caribbean. His current problem is the rape-murder of a white lady tourist last seen diving in Flamingan waters--and then the murder (accidental death?) of her Flamingan-gigolo-boat-captain. The key, of course, is what she was diving for (a lost treasure ship?), so the investigation involves lots of map-reading, code-breaking, and diving, and a little history. Mystery-wise, this is at best routine, but Munroe and friends (his hotel-manager lady, his lovably despotic Prime Minister) are in the sure hands of old-pro Andrew York, with ingratiatingly low-key results.