The book explores the dwarf planet Pluto and its place in our solar system. It details Pluto's discovery, its physical characteristics, and the scientific debate surrounding its classification as a planet. The text aims to provide readers with a comprehensive overview of this distant celestial body, drawing on astronomical data and research.

This book is likely intended as an accessible introduction to Pluto for young readers, given its inclusion in the 'Watts Library : Space' series. The content focuses on factual information and scientific classification, suggesting a straightforward, educational approach. The reception would likely be positive among students and educators seeking clear, concise information on the dwarf planet.