(Rookie Club #1) by Danielle Girard - Previously published by Signet as "The Rookie Club" in 2006
Fifteen years ago, the Rookie Club began as a tight-knit band of female cops struggling for respect from their male peers. Jamie Vail was one of them. So was Natasha Devlin, the woman Jamie caught in bed with her husband.
When Natasha Devlin turns up dead, Jamie wants nothing to do with the investigation. As a seasoned inspector in the sex crimes department, Jamie is facing her own terrifying case—female officers are being brutalized by a stranger leaving no clues. The Rookie Club is under attack, possibly by one of their own.
Now, Jamie must confront her past and solve the murder of her ex-husband's lover before she becomes the killer's ultimate prize.