Wilde Child: Wildes of Lindow Castle (The Wildes of Lindow Castle, 7, Band 6)

Eloisa James returns to the Wildes of Lindow Castle series with the next Wilde child who runs and joins a theatre troupe -- and the duke who tries to save her reputation.

He wants a prim and proper duchess, not the Wildest of the Wildes!
Already notorious for the golden hair that proves her mother’s infidelity, Lady Joan can’t seem to avoid scandals, but her latest escapade may finally ruin her: she’s determined to perform the title role of a prince—in breeches, naturally.
She has the perfect model for an aristocratic male in mind: Thaddeus Erskine Shaw, Viscount Greywick, a man who scorned the very idea of marrying her.
Not that Joan would want such a dubious honor, of course.
For years, Thaddeus has avoided the one Wilde who shakes his composure, but he’s horrified when he grasps the danger Joan’s putting herself in. Staring into her defiant eyes, he makes the grim vow that he’ll keep her safe.
He strikes a bargain: after one performance, the lady must return to her father’s castle and marry one of three gentlemen whom he deems acceptable.
Not including him, of course.