An American customs agent looks into a murder in Mexico as a hurricane bears down on the tropical landscape in this "first-rate" mystery (Kirkus Reviews).   US Customs Service agent and amateur sleuth Hugh Rennert has been invited to Hacienda Flores, an isolated mountain retreat in Mexico. A consortium of Texas investors with an interest in the place have asked him to investigate a murder that could be bad for business . . .   But confronting a killer isn't the only danger Rennert faces as an epic storm approaches in this mystery filled with twists and turns that, according to the New York Times Book Review, are "guaranteed to keep the reader interested and greatly puzzled."