A Most Relentless Gentleman - Secrets of the Zodiac, #7

A lord with two lives, a woman with a broken heart, a scandalous bargain, and a second chance for love. Cameron, Lord Deverall, appears to be a completely dissolute dandy, a favorite at London's fanciest parties, relied upon to speak of nothing serious. In reality, he is a member of the Zodiac, England's elite spy ring. He can't let anyone close enough to him learn the truth-especially not his lovely, estranged wife.
Unfortunately, he needs her for his next mission. Lady Genevieve hasn't seen her maddening husband in three years. Heartbroken after catching him in a scandalous encounter, Gen tossed him out and turned her attention to her heart's solace: helping London's poorest children. If she can't have a family of her own, she'll be a mother to the world, without Cameron at her side. But fate brings Cameron and Genevieve together once again, when he offers her a deal she can't refuse.
All she needs to do is let Cameron back into her life for a little while.just long enough to uncover his darkest secrets. Just long enough to learn they're being pursued by a shadowy nemesis. Just long enough to realize she's never stopped loving him. A Most Relentless Gentleman is the seventh novel in the Secrets of the Zodiac, a series of historical romances featuring sexy storylines, complex characters, and international intrigue, set against the backdrop of the Napoleonic Wars.