Photographs and text explore the relationship between Abraham Lincoln and his sons, Eddy, Willis, Tad, and Robert, the only son to live past the age of eighteen. Interest Level: 5-8 Reading Level: 7.4 ATOS Book Level: 7.7 AR Interest Level: MG AR Points: 9 AR Quiz: 142728EN Reading Counts Level: 9.5 Reading Counts Points: 14 Lexile Measure: 1060.