Illustrated by Amy Huntington. Math Fun with Sebastian Pig and Friends series. A porcine protagonist and his animal pals enlist their math know-how in these books. The stories in Counting and Subtracting are the most engaging. Measuring is the weakest volume: some of the awkward illustrations don't match the text. In all the books, excerpts from Sebastian's notebook show the math concepts. All but Counting includes a glossary. Reading list, websites.

Ind., The Horn Book Guide Fall 2009.