Lord Rogue by Tiffany Green

When Lady Evie returns from France, she is no longer a broken-hearted wallflower, but has bloomed into a gorgeous, independent woman determined to put the past behind her. She most especially wishes to forget a certain rogue who invalidated their betrothal six years ago. As she trains to become a member of the highly secretive Guardians, who bring justice to those who have been wronged, Evie can actually see an exciting future without Lord Fielding. Or so she thinks.

Jeremy Longwell, Lord Fielding, has a secret. To most of Society, he is a flirt, a rake of the first order, happy to indulge in all life’s decadence, never to utter a serious thought. That is nothing but a ruse to conceal what he is really about. Known as “Rogue” to the Guardians, he uses his prowess to gather information needed to solve cases. So, when a new recruit arrives to help bring down a murderous organization known as the Viper’s Nest, he is shocked to discover her identity. Jeremy is also having the deuce of a time accepting her plan of returning to France once the mission is over. He already let her go once and is yet again faced with the same dilemma: remaining a Guardian or keeping Evie with him forever.