The Mark of a Rogue by Adele Clee

The path to true love begins in the most unlikely place. A late-night encounter in a graveyard.
When Lawrence Trent, illegitimate son of Viscount Ranfield, discovers someone is secretly tending his brother’s grave, he feels compelled to investigate. Since his brother’s mysterious death, he’s been plagued by suspicions of murder and is desperate to find proof. Imagine his surprise when he encounters a young woman in the churchyard at midnight. Imagine his shock when she instructs him to strip off his shirt, demands to see if he bears the mark of the notorious gentleman’s club known as the Brethren.

A lady who needs to atone.
Believing herself responsible for the deaths of her cousin and his friend, Miss Verity Vale can do nothing to make amends other than pay her respects. Having suffered at the hands of a Brethren blackguard, too, she is helpless when it comes to seeking justice. Until an encounter with a handsome stranger brings a perfect opportunity for vengeance.

A wild and passionate adventure for two people who never hoped to find love.
Thrown together in a bid to solve the mystery and find those who killed their kin, Lawrence and Verity journey into an evil world of blackmail and corruption. But it’s not the shocking revelations about the Brethren that send their hearts racing. It’s their growing attraction to each other. Can love blossom when the Brethren are determined to tear them apart?