A Bad Day for the Dream — Dean Wesley Smith

Thirty years ago in Las Vegas, Becky Penn said goodnight to her mother to go out with friends and vanished without a trace.
Retired Detectives Bayard Lott and Julia Rogers, members of the Cold Poker Gang, take on Becky Penn's cold case.
They love working with other retired detectives and playing a little poker once a week, all to solve cold cases.
A puzzle mystery unraveled carefully by the retired detectives who make up the Cold Poker Gang.