Mission: Her Shield by Anna Hackett

She’s the one woman he’s always wanted and the one woman he’ll never let himself have, but former Delta Force soldier Axel will risk everything to save his covert team’s beautiful archeologist.

Former Delta Force soldier Axel Diaz knows that fighting the bad guys requires getting down in the muck. He’s done too much and seen too much to ever inflict his nightmares on a woman. Especially a gorgeous, smart archeologist who ignites his blood like no one else. Axel focuses on his work with the covert, black ops Team 52. He’ll work alongside Dr. Natalie Blackwell as they safeguard pieces of ancient technology, but he’ll never let himself touch her.
Then everything changes when Nat calls for help. Her archeology conference in Greece has gone horribly wrong…
Dr. Natalie Blackwell loves her work with Team 52. A lonely childhood and an indifferent family have taught her to be independent. She’s been attracted to Axel for a long time, but refuses to be another notch on his very notched bedpost. But when she finds herself in terrible danger, being hunted by something terrifying, all she wants around her are Axel’s muscled arms. She is in the fight for her life, and she’s praying her team—and the man she can’t resist—can find her in time.