Illustrations match text and they support each other
Appropriate vocabulary for level of students
Book content and/or illustrations are not too simple for the age group
Simple, direct text, with not too many words per page. Repetition is good
Natural English (avoid rhymes, idioms, wordplay)
Abstract concepts are explained by text and illustrations
Avoid books portraying stereotypes/caricatures (either in text or in images)
796 = sports
590-599 = animals