Look to the Lady (Felony & Mayhem Mysteries) (Albert Campion)

Some objects just cry out to be stolen, and an obliging ring of international thieves stands ready to heed the cry. Their current target is the Gyrth Chalice, a priceless goblet that the Gyrth family has for centuries held in trust for the British Crown. Kept in a windowless chapel, and protected by a fearsome curse, the Chalice should be impervious to thievery. But this is 1930, and the crooks have all the advantages of the modern world. Chief among these is the craving for publicity, to which at least one member of the Gyrth clan has succumbed. Her careless chatter about the Chalice seems to have called up all manner of misfortunes - of which larceny is just the beginning - and the vague, bespectacled Albert Campion doesn't look like he'll be much help against them. But looks can be deceptive.