商品簡介
When a valuable fraction goes missing, young inventor George Cornelius Factor, suspecting the work of the villainous Dr. Brok, creates a tool for simplifying and revealing fractions that have been sneakily disguised. By the author of A Very Improbable Story. Simultaneous.
作者簡介
Edward Einhorn is the author of A Very Improbable Story: A Math Adventure, as well as two Wizard of Oz sequels, The Living House of Oz and Paradox in Oz (Hungry Tiger Press, 2005 and 1999, respectively). Edward lives in New York City.
