This comprehensive 8-book collection set is a great resource for young readers aged 9-12. The set includes titles such as Encyclopedia: Substances, Mixtures and Compounds, Encyclopedia: Energy and Evolution, and more. Each volume provides clear, illustrated explanations of a single subject, making it perfect for curious children, home educators, and classroom libraries. The books are compiled by the Om Books editorial team and cover a range of school-level science topics, from atoms and chemical reactions to ecology and particle physics. The set is a brand new paperback collection, published by Om Books International.