His Moonbeam Girl - The Reluctant Unions, #1

Although young, Lettice has seen more of life than she should on a Jamaican slave plantation. Given her freedom by the newly minted Earl of Kempner, Lettice snatches at the chance for a new life in a new land, but she has no intention of withering away in a spinster's life. She has her eye on Kwasi. He'd make an ideal husband for her. The only problem is the former slave, Kwasi, does not share her views.
Moreover, he says she's too young to marry. Lettice hopes her love can liberate him.