Eva Shepherd 
BEGUILING DUKE_BREAKING MAR EB [EPUB ebook] 

Can an impoverished orphan…ever marry a duke? Penniless American Rosie Smith will do anything for her wealthy guardian’s daughter. She’ll even save her friend from a marriage of convenience with a stuffy Englishman by posing as her at his house party! But her plan to put off the Duke backfires spectacularly, because beneath his stiff formality is a hard-working and amusing man. Too late Rosie finds she»s falling for Alexander—only he has no idea who she really is…