John D. MacDonald 
Beach Girls [EPUB ebook] 

Leo Rice seems like a nice enough guy, but why does he have to choose their beach? He could head ten miles up the Florida strip and everyone could just live happily ever after – no questions asked.But Leo Rice does ask questions … and suddenly Stebbins’ Marina, an oasis of easy living, hard drinking and free love for its residents, is in jeopardy. And in less than a month, their paradise will be interrupted by twisted emotions, buried hatred – and brutal murder.