Murder is a Beach — Rose Pressey

Maggie Thomas is still stumbling her way through running her uncle's Miami Beach P.I. agency. When a dead woman washes up on the shore, Maggie has reason to believe the woman's death wasn't an accident. Maggie may have recently solved her first case as a private eye, but handsome detective Jake Jackson warns her that this one is too complex.

Maggie ignores Jake's warning.

When a man involved in the case disappears without a trace, Maggie and her orthopedic shoe-wearing assistant, Dorothy Raye, go undercover to help crack the case -- that is, if Dorothy can put down her knitting needles long enough.

With boat chases, explosions, and sharks, Maggie soon finds out that sometimes murder is a beach and sometimes you die.