Phil the dog and Pippo, his human companion, travel through time to discover intriguing facts about systems of counting and numerical representation developed by many cultures. An informative and imaginative 13 1/4 x 9 1/4" towering text is accompanied by delightfully zany illustrations in which personified numbers dance, roll and fly across pages. Other full-page art shows Phil and Pippo among Aztecs, Ancient Egyptians, Sumerians and others whose numerical achievements continue to be counted today. (Ages 7-11)