My Ruthless Prince (The Inferno Club)

is book #4 of The Inferno Club by Gaelen Foley.
==Book Description==
The Inferno Club: In public they’re a society notorious for pursuing pleasure. In private, these warriors would risk their lives for king and country.
Their forbidden love can no longer be denied.
His brother warriors fear the Earl of Westwood has turned traitor, but Emily Harper knows this is impossible for the man she has loved since childhood—as impossible as a marriage between them could ever be—she, the gamekeeper’s daughter and he, a bold and adventurous nobleman. 
Driven by hatred and revenge, Westwood is playing a deadly game of deception, bent on destroying the enemy’s dark conspiracy from the inside, and he’s furious when Emily plunges herself into danger for his sake. Forced into close quarters, their long-suppressed desire explodes into all-consuming passion. 
Emily knows her love can save him…but Drake is a man who doesn’t want to be saved.
(Description from gaelenfoley.com)