Cool-Doo Math is a comic series with all the main characters from TUM - The Unmoved Mover which is a story about "brotherhood" and "With great power comes great responsibility." (http: //www.t-u-m.net) Word problems are usually boring for most kids. Cool-Doo Math turns those knotty problems into funny stories. Kids will find math so interesting Bound Volume 01 includes single Vol.01-04.