Fool of Hearts — Terri Lynn Wilhelm

A DANGEROUS DECEPTION
After the untimely death of her father, Lady Gillian Ellicott is left at the mercy of her mysterious new guardian Calum, Marquess of Iolar. Desperate to outwit the bold Scottish laird, Gillian sets into motion a scheme so outlandish it couldn't possibly work. Or could it? What she didn't figure on was the undeniable desire that blazed between her and her protector and threatened all she cherished most.

AN UNEXPECTED PASSION
Lord Iolar's duty demanded that he properly protect the Lady Gillian, despite her skillful falsehoods and reckless wiles. But no amount of resolve could keep Calum away from the tempting heat of his ward's defiant spirit -- or from risking life and honor for love's glorious promise.