Marvelosissimo the Mathematical Magician of How Much Is a Million? and If You Made a Million fame returns to lead his happy band of young explorers on a journey through time. With their enchanting guide, they witness the history of measurement and learn how (and why) to use modern-day units, especially the metric system. Readers will be informed and entertained at the same time. Ages 5-10. $18.00

"Schwartz manages to impart a good deal of basic information about linear, weight and volume measurements, all while entertaining the reader... The froth of fun that lightens this book’s educational intent may help American children absorb their centimeters and kilometers with ease."

–Booklist, starred review

"In his systematic and logical style, Schwartz presents an enormous amount of information in an impressively clear and concise manner. Although Schwartz's intention is to make a point about the relative simplicity of the metric system, he does not neglect American standards, and thereby keeps the work relevant -- it can serve as an introduction to measuring, and can also function as a reference guide. . . The Schwartz-Kellogg team has got it right again: this should be part of every professional's collection." [ages 5-12]

–Kirkus Reviews, starred review