The Guardian's Mission and The Protector's Promise (Harlequin Themes\Love Inspired Classics)

THE GUARDIAN'S MISSION 

The handsome stranger Martha Gabler encounters near her isolated mountain cabin claims he's an ATF agent working undercover. Tristan Sinclair insists that if she doesn't play along as his girlfriend, they'll both end up dead. Soon she's hoping he'll take on a new mission: guarding her for the rest of her life. 

THE PROTECTOR'S PROMISE 

Grayson Sinclair vows to find out who's after his widowed neighbor and her child—without getting emotionally involved. Family life isn't for him, but he won't let some deranged person destroy the lovely home Honor Milone has made for her daughter. But can he continue to resist them when they're stealing his heart?