Our Jubilee Is Death (Carolus Deene #6)

Walking on the sand before breakfast, Carolus Deene's cousin Fay comes upon the head of Lilliane Bomberger, the celebrated and universally detested novelist. The body had been buried in the sand in an upright position with only the head protruding: at least one tide had washed over it. Before this frustrating case ends, three murders are committed.