Sir Cumference and All the King's Tens (Charlesbridge Math Adventures) Paperback – Illustrated, 1 July 2009

A good story woven round an educational theme. My grandson loves it. (I shouldn't have to keep adding unnecessary words to reach Amazon's wordcount.)

Fab book for maths lessons

Part of a set of books, some more harder than others to understand. Great pictures. Got a bit boring at times though