My Wicked Marquess Inferno Club Series, Book 1.

To restore family honor the Marquess of Rotherstone faces his most dangerous mission-finding the perfect bride... To London's aristocracy, the Inferno Club is a scandalous society of men no proper young lady would acknowledge. But though they are publicly notorious for pursuing all manner of debauchery, in private they are warriors who would do anything to protect king and country. The Marquess of Rotherstone has decided it's time to restore the...