Helen Dickson 
Beauty in Breeches [EPUB ebook] 

The wedding wager Wildly unconventional orphan Miss Beatrice Fanshaw has one goal—to claim back her ancestral home from the devilish Julius Chadwick, Marquess of Maitland, who makes her heart beat quite erratically!Knowing Julius's weakness for a flutter, she decides to play the distinguished but disreputable Marquess at his own game. A wager is on—the fastest horseman wins! Astride her horse—in her breeches—should she win the wager, Beatrice is poised to name her forfeit!