Blue-sequined jockstraps, Diana Dors film festivals, kinky costume parties, dragqueen repartee: the emphasis in this second case for homosexual bartender D. Valentine and his chum Clarissa (the first appeared only in paperback) is more on the summer nightlife in Provincetown, Mass. than on the mystery. There are, however, some murders--starting with a sexy, strangled drug-dealer with cobalt-blue eyes (Clarissa finds him dead on the beach) and soon followed by the pseudo-suicide pool death of a ""hi-tech lesbian."" And, while Valentine concentrates on his busy sex life, Clarissa insists on sleuthing. . . even though a top suspect is her homosexual uncle, a permanent Provincetown resident. (Another likely killer is one of Valentine's lovers. . . till he becomes victim #3.) Mediocre solution, unappealing people--but along with many smutty/tasteless jokes are quite a few funny ones (plus some shrewd observations on the milieu), so devotees of naughty high/low camp may want to sample the dialogue here.