Junior Library Guild is a book-subscription service for school and public libraries whose editors pick promising new titles before publication, so a JLG selection is a professional recommendation rather than a prize. The Instructional Nonfiction category (from 2024) picks how-to and curriculum-friendly informational books on science, health, history, and skills like chess (e.g., Become a Chess Champion, How to Know a Crow). Best for ages 7-14.