Odds On by Michael Crichton writing as John Lange (1966)

• Author: Michael Crichton writing as John Lange
• First Published: January 1, 1966
• Score: 7/10

Goodreads

Steven Jencks has planned the perfect crime. Working with two skilled associates, he will hit the Reina, a super-luxury hotel off the coast of Spain, and then walk away with the haul of a lifetime. As the ultimate pro, Jencks has even run his plan through a complex computer simulation to account for every possible variable …

Except three.

Their names are Annette, Cynthia, and Jenny. And no computer could ever simulate what these three femmes fatales have up their sleeves.