A wealthy lord (who also happens to be a brilliant scientist) and a young widow (who secretly pens satirical political cartoons) in Regency London team up to chase down rumors of corruption within the powerful East India Company and the mysterious disappearance of friends in Andrea Penrose’s fourth Wrexford & Sloane Mystery—perfect for fans of Deanna Raybourn, Tasha Alexander, and Amanda Quick.

The many strands of a dark mystery entangle Lady Charlotte Sloane and the Earl of Wrexford in a dangerous web of secrets and lies that will call into question how much they really know about the people they hold dear--and about each other...

When Lady Cordelia, a brilliant mathematician, and her brother, Lord Woodbridge, disappear from London, rumors swirl concerning fraudulent bank loans and a secret consortium engaged in an illicit--and highly profitable--trading scheme that threatens the entire British economy. The incriminating evidence mounts, but for Charlotte and Wrexford, it's a question of loyalty and friendship. And so they begin a new investigation to clear the siblings' names, uncover their whereabouts, and unravel the truth behind the whispers.

Charlotte and Wrexford also struggle to navigate their increasingly complex feelings for each other. But the clock is ticking--a cunning mastermind has emerged...along with some unexpected allies--and Charlotte and Wrexford must race to prevent myriad disasters as they are forced into a dangerous game of wits in an attempt to beat the enemy at his own game.

Series order taken from author's website.