Rules of Rebellion (Regency Rebelles #3)
Jen Yates

Her cousin and partner in all rebellious activities has just set off on the adventure of a lifetime, riding to Moscow with her new husband.
Envious, bored and restless, what could be a better antidote than going to Paris disguised as a man to help Major Beaumont rescue a lady in trouble.
Major Alex (aka Griz) Beaumont believes ‘men should be men and women should be ladies’ and is not shy about stating his opinions.
What could possibly go wrong?