In his seventh screwball mystery, Dorsey (Cadillac Beach
; Orange Crush
) serves up his usual cocktail of tropical mayhem and humor, though the mix is a little slushy this time around. Serge Storms, the nutty serial killer from Dorsey's previous novels, has gotten it into his head to search for Mrs. Right. His quest takes him to the underbelly of the Florida Keys, where he finds unlikely true love the minute he spots mousy librarian Molly. But even marriage can't tame Dorsey's hyperactive antihero, whose extracurricular activities of murder and cult organizing eventually lead to a clash with an Enron-like CEO eager to rebuild the community, and with a mysterious drug lord who is intent on destroying it. Muddying the waters are Coleman, an annoying junkie with the mentality of a fourth grader; Gus DeLand, a deputy whose ex-girlfriend's revelations about his sex life have the whole town laughing; and Anna Sebring, a woman out to avenge her brother's death. A few ingenious plot points entertain, but never credibly intersect; the hectic action fails to add up to a smooth-flowing story. The colorful Keys get Dorsey's trademark treatment, but even irrepressible zaniness isn't enough to keep this leaky vessel afloat. 7-city author tour. (Feb.)