Helgerson, Joseph

Along a magic-saturated stretch of the Mississippi River near Blue Wing, Minnesota, twelve-year-old Claire and her bullying cousin Duke are drawn into an adventure involving Bodacious Deepthink the Great Rock Troll, a helpful fairy, and a group of trolls searching for their fathers.

Zebulon Crabtree, who was sent by his parents to apprentice with a tanner back in 1849, eventually follows his own instincts and hangs out with a riverboat gambler and a slave who becomes his friend, and when he gets caught up with the Brotherhood, he tries to find a way out.