A Gentleman's Wager (Omnibus Editions). Scandalous Seductions Omnibus Editions, #1

Journey back in time to the Regency era with this spicy rivals to lovers series of ménage novels from New York Times and USA Today bestselling author, Madelynne Ellis. This omnibus edition contains books 1 and 2 of the Scandalous Seductions series, along with the bonus story, One Winter's Night. When Miss Bella Rushdale sets out to win Viscount Marlinscar's hand in marriage, she doesn't expect her main rival to be another man.
Vaughan, the decadent Marquis of Pennerley has loved Lucerne for years, and now, at remote Lauwine Hall on the wild Yorkshire Moors, scandalously intends to claim him. A passionate struggle results pitting the debauched rakehell and the wilfully improper miss against one another, but ultimately, it will be up to Marlinscar to choose the victor, and he wonders, if there isn't another--admittedly forbidden--arrangement they could all agree upon.