In 1867, fifteen-year-old Sean experiences both hardships and rewards when he joins his father in working on the building of the Transcontinental Railroad. Interest Level: 5-8 Reading Level: 6.2 ATOS Book Level: 5.9 AR Interest Level: MG AR Points: 5 AR Quiz: 32210EN Reading Counts Level: 5.7 Reading Counts Points: 7 Lexile Measure: 1060 Fountas & Pinnell: W.