Before He Lapses by Blake Pierce

FBI Special Agent Mackenzie White, six months pregnant, calls off her formal wedding with Ellington and they elope instead. On their honeymoon, they finally have some downtime together—when a call comes in for an urgent case: women are being strangled at a rapid rate in the D.C. area by what appears to be a serial killer. Even more disturbing: this killer is so meticulous that he leaves absolutely no trace.

Mackenzie comes up with a radical theory for who he might be, but pursuing it may jeopardize her own job—and her own life. In her most intense game of cat and mouse yet, she finds herself struggling to keep her baby and her sanity while up against a diabolical psychopath, her own agency, and the hunt of her life.

Even with her all of her wits, it may be too late for her to save the next victims—or herself.