The Rake and Miss Asherwood — Amy Lake

Miss Elizabeth Asherwood has a secret that she has kept from the ton: a young half-sister, Marguerite, living in France. But this is the time of the Terror, and when Marguerite needs to be rescued, Elizabeth must seek out assistance. Should she rely on her almost-fiancé, Geoffrey Winthrop?  Or on that notorious rake who works for the Foreign Office, Lord Peregrine Blakeley? Georgian Romance by Amy Lake; originally published by Belgrave House/Regency Reads