This content analysis explored children's fictional storybooks and informational science books to determine their differences in high-quality text features that support oral language (OL) development. We also explored the opportunities for OL development in curricular books compared to trade books. Using systematic coding procedures, we evaluated the genre, vocabulary, syntactic variety, supportive visuals and cultural sensitivity in books from three kindergarten and Grade 1 reading curricula (n = 521) as well as a sample of commercially-available trade books (n = 48). Descriptive information was averaged to determine the percentage of high-quality text features included in each book type and genre. Results indicated that informational science trade books offered more opportunities for rich language experiences than their curricular counterparts or any of the fictional books. Thus, there is reason to believe that informational science trade books with high-quality text features may promote OL development and enhance the learning of young students.