Sanders, Lawrence: McNally's Secret (Archy McNally #1)

Sex, lies, blackmail. Archy McNally is a freewheeling playboy who specializes in "Discreet Inquiries" for the rich and not-so-discreet. Beneath the glaring sun of Palm Beach - and behind the lowest crimes of high society - he is paid to keep family skeletons in the closet. But when it comes to sex and scandal, he has a few secrets of his own.