One Penny, Two by David E. McAdams

One Penny, Two

One Penny, Two "If you put a penny in the box and don't take any out, it will double each day," Old Joe told Sig. "If the penny doubles each day," wonders Sig, "how long will it take to get a dark green convertible sports car?" Will Sig be able to keep the pennies in the box until it is enough?

This book is not yet complete, and is expected to be finished in a few months.