This book investigates the fundamental nature of time and its measurement. It explores how we quantify time, the mechanics behind clocks, and the historical context of timekeeping before mechanical devices. The content aims to provide clear explanations for young readers about a complex scientific and historical concept.

This book is part of the Collins Big Cat series, which is designed to support reading development in children. The Ruby Band indicates a level suitable for children who are becoming more independent readers, suggesting that the content is presented in an engaging and understandable manner for this age group. The focus on scientific and historical inquiry within a children's non-fiction context implies a clear, informative, and educational approach.