The Dastardly Duke (Love in Disguise #2)

Tormented by a dark secret, Julian LeFevre, Duke of Claridge, is a notorious and dissolute rake. His half-hearted attempt to reform his character has left him bored to death. To relieve the tedium, he wagers a friend that he can mold any pretty trollop from the London streets into a lady who'll pass muster with society's elite.

But Hannah Gregory is no biddable lump of clay. She has solemn gray eyes, a rebellious streak -- and is deaf from a long-ago accident. And although she conceals her real past, she can't conceal her attraction to the scoundrel who offers her a small fortune that could pay for a new medical treatment.

The charade might heal her, but it also might break her heart -- if she forgets that this dark and dangerous duke is well past the point of redemption.

About the Love in Disguise series:
Daring masquerades, with love as the prize

In these tales of Regency intrigue, nothing is as it seems: A street wench masquerades as a debutante to fulfill a rake’s wager; an actress pretends to be a vengeful lord’s mistress to catch a killer. A noble war hero disguises himself as a much older man to woo an on-the-shelf spinster. An independent widow forces her disapproving business partner to pretend to be her fiancé — and teach her about passion.
All are daring masquerades, with love as the prize.

The books:

The Perfect Bride
The Dastardly Duke
A Passionate Performance
Reforming Harriet