Jack of Clubs - The House of Cards Trilogy, #2

Years ago, Captain Jack Endicott's half-sister vanished after a carriage accident. He now sets out to honor his father's dying wish and find her. Jack plans to open a lavish gaming parlor and hire only beautiful ladies to deal cards, possibly finding his sister. All he needs is a little luck. Instead he finds prim schoolteacher Allie Silver, who needs a guardian for one of her most precocious pupils.
With such an unlikely duo, all bets are off in a wild game of romance.