An illustrated overview of the history of horse breeds since ancient times and how they have been used by humans. Interest Level: 3-6 Reading Level: 6.7 ATOS Book Level: 8 AR Interest Level: MG AR Points: 2 AR Quiz: 149245EN Reading Counts Level: 11.6 Reading Counts Points: 6 Lexile Measure: 1160 Lexile Code: NC (Non-Conforming Text).