This book is part of a book series called Rookie Read-About Math .

This book was published by Children's Press(CT) .

Ellen B. Senisi is the author-photographer of numerous photo-essays for children, including Just Kids and Berry Smudges And Leaf Prints, a School Library Journal Best Book of the Year. She lives in New York, USA. Trish Marx is the author of many award-winning non-fiction books, including Sharing Homeland, Jewish and Palestinian Children In The Middle East and Touching The Sky, Two True Stories About The Wright Brothers.