Sir Cumference and the Dragon of Pi -

When Sir Cumference drinks a potion which turns him into a dragon, his son Radius searches for the magic number known as pi which will restore him to his former shape.

Sir Cumference and the Dragon of Pi 2002, Turtleback Books

ISBN-13: 9780613352284

Turtleback School & Library edition

Hardcover

Select
Sir Cumference and the Dragon of Pi 1999, Charlesbridge Publishing

ISBN-13: 9781570911644

Trade paperback

Select