When Henry falls in love with a puppy but his father will not buy it for him, his heart reacts strangely. Includes facts about the heart's role within the body. Interest Level: K-3 Reading Level: 2.1 ATOS Book Level: 2.7 AR Interest Level: LG AR Points: .5 AR Quiz: 148011EN Reading Counts Level: 1.4 Reading Counts Points: 2 Lexile Measure: 420 Lexile Code: AD (Adult Directed).