A history of timekeeping discusses the evolution of clocks and calendars, examining the various calendars that exist--including the Gregorian, Hebrew, Muslim, and Chinese calendars--and what they mean in terms of how we keep track of the passage of time. Reprint.[...]

A history of money, beginning with the barter system in prehistoric times, to the first use of coins and paper money, to the development of the modern monetary system. "A windfall for whole-language classrooms and for nonfiction pleasure readers." -- School Library Journal, starred review[...]