Fiona and the Enigmatic Earl — Grace Callaway

She is a member of a secret society of lady investigators. He is a spy for the Crown. Both want a marriage of convenience as a cover for their true activities... What could go wrong?

When her overprotective family tries to curtail her activities, spirited and independent debutante Fiona Garrity decides marriage is her surest way to freedom. All she needs is an accommodating, and preferably not too perceptive, husband with his own hobbies so that he will not interfere with hers. Destiny puts her into the path of a reputedly staid and scholarly earl. He would be the perfect candidate…if only his grey eyes were not quite so magnetic, and his virile nearness didn't affect her in such a stimulating manner…

After the death of his first wife, Thomas Morgan, the Earl of Hawksmoor, has sworn off love. He is torn between his duty to produce an heir and his true passion: his work as an agent of the Crown. Fate gives him a solution when a dazzling debutante proposes a practical union that would allow them both to maintain private lives. She would be an impeccable choice…if only her heavenly gaze didn't lay bare his secret needs and her delectable form didn't tempt him to unleash his darkest desires…

Fiery passion threatens the negotiated rules of Fiona and Hawk's marriage. As desire turns into love, a dangerous case brings them into shocking contact. Will their marriage of convenience survive attacks from the past and present and transform into a love for all time?

Grace's books feature hot historical romance, fun and feel-good happily ever afters, and exciting mystery and adventure. Her books are standalones which can also be enjoyed as part of her interconnected series.