Georgette Heyer 
The Black Moth [EPUB ebook] 

An earl’s son turned highwayman…
A spirited young society beauty who is kidnapped…
A sinister duke, known as ‘The Black Moth’…
Set in the eighteenth century at Georgian England. Disgraced Jack Carstares, now rightful Earl of Wyncham, left England seven long years ago, sacrificing his honour for that of his younger brother when he was accused of cheating at cards. But he is determined not to claim his title and instead turns highwayman.
Now he is back, roaming his beloved South Country in the disguise of a highwayman. Not long after his return, he encounters the Black Moth, his old adversary, the notorious Lord Tracy Belmanoir, Duke of Andover, just in time to dispute at the point of his sword the attempted abduction of dark-haired lovely Diana Beauleigh.
Once more Jack’s noble impulse to save the day landed him in trouble, but not before sending the villainous duke scurrying. Diana took her gallant rescuer in and nursed his wounds, and soon truer emotions grew between them. But Jack couldn’t stay, for a lady and an outlaw would make a scandalous pair.
And the libertine Duke was foiled once, but the society beauty was under siege. The Duke of Andover meant to have her—if not with her assent, then by force. But Diana was not about to surrender her virtue. She had already lost her heart to the handsome mysterious highwayman who rescued her from the Duke. Torn between his tarnished past and the hope for Diana’s hand, Jack had one dangerous chance to reclaim his honour—by defeating the Black Moth for good!