Thief of Shadows (Maiden Lane #4)

A MASKED MAN . . . 
Winter Makepeace lives a double life. By day he's the stoic headmaster of a home for foundling children. But the night brings out a darker side of Winter. As the moon rises, so does the Ghost of St. Giles-protector, judge, fugitive. When the Ghost, beaten and wounded, is rescued by a beautiful aristocrat, Winter has no idea that his two worlds are about to collide.
A DANGEROUS WOMAN . . .
Lady Isabel Beckinhall enjoys nothing more than a challenge. Yet when she's asked to tutor the Home's dour manager in the ways of society-flirtation, double-entendres, and scandalous liaisons-Isabel can't help wondering why his eyes seem so familiar-and his lips so tempting.
A PASSION NEITHER COULD DENY
During the day Isabel and Winter engage in a battle of wills. At night their passions are revealed . . . But when little girls start disappearing from St. Giles, Winter must avenge them. For that he might have to sacrifice everything-the Home, Isabel . . . and his life.