Freedom Seekers series
The Freedom Seekers series is a six-novel middle-reader set in 1857. Feel the rush of immigrants to the new land, and the dangers of the Underground Railroad in these true-to-life Riverboat stories. 
Libby Norstad is excited to start her new life with her father on his riverboat, the Christina. But, Libby soon realizes that life on a riverboat is nothing like life in her aunt and uncle's mansion in Chicago. And then there's her father's cabin boy Caleb, and Libby is convinced that Caleb is trying to hide something from her. She could never have guessed where this secret would take her, Caleb and the runaway slave Jordan as they learn what is it to be truly free and a never-give-up-family.