Eleven-year-old Silver sets out to find the Timekeeper--a clock that controls time--and to protect it from falling into the hands of two people who want to use the device for their own nefarious ends.
Explains how to tell time and discusses such aspects of time as day and night, days of the week, and months of the year. Includes a fold-out clock face for practice.
Looks at how early civilizations thought about and measured time, discusses attempts to make time visible, and examines the invention of the clock and its effects on the course of world history.
Explores the world before the invention of mechanical clocks; looks at the life of John Harrison, creator of the first accurate and portable mainspring clock; and discusses how the world has changed as a result of the invention.