McNally's Gamble — Lawrence Sanders

Archy McNally returns in an enticing novel of sun and sin in Palm Beach - where the rich count their schemes before they're hatched. Well-to-do widow Edythe Westmore has announced her intent to invest a large part of her fortune in a Faberge Imperial egg. Horrified, her children argue against the financial risk - and enlist Archy's services to put the kibosh on the deal. But when the sleuth sticks his nose in the widow's business - closely watched by family and friends - the whole case begins to smell like a rotten egg...but much harder to crack.