The Prime Factor

 A modern-day noir thriller with a hard-bitten female protagonist.
 

Asta Wilson is a brilliant but cynical computer expert. Her father was a sleazy private detective. When she agrees to help his former partner on a simple case, it proves to be anything but simple. Cryptic codes, a mysterious femme-fatale, and a brutal murder draw Asta into deadly conflict with a ruthless Russian mastermind. As the body count rises, Asta must unravel the plot before she becomes the next victim.