Vanished — Suzanne Ferrell

The fourth book in the Edgars Family Romantic Suspense Series They had a history… Five years earlier Luke Edgars and Abigail Whitson met at FLETC, the training center for government agents. It was instant dislike. She thought him an arrogant, showoff flirt, he thought it would be safer for everyone if she stayed behind her analyst's desk. She's in trouble… Now Luke's world turns sideways when he finds Abby standing in the middle of a bloody crime scene and the victim has vanished. He needs to protect her… Luke realizes that not only does Abby need his help to find her friend, but the friend has put Abby in the cross-hairs of a dangerous group who will stop at nothing to hide their secrets.