The story Sir Cumference + The Dragon of Pi: A Math Adventure is about a boy named Radius that is trying to help his father Circumference because Circumference had a stomach ache. So Radius went to find the doctors but he couldn’t find them so while in the hospital he found a potion that he thought was a cure. After he gave this potion to his father his father turned into a dragon. The town though the dragon would destroy everything so they planned to kill him in the morning. But radius wouldn’t let that happen so he went on a long journey to find the poems answer about Pi. And they all happily ever after. I think this book is good for age 7+. The moral of the story is never give up!