Volumes 9 and 10 of a picture book series themed around experiments. Both covers have tears. The contents are free of tears and writing. The covers were badly torn during a move. The contents haven't been read much and are not very damaged. Volumes 11 and 25 are also planned to be listed. - Series Name: Experiment Showdown - Volume: 9 - Theme: Weather - Volume: 10 - Theme: Heat - Publisher: Gondor - Author: Cheong Jong-hyeon Thank you for looking.