The book under scrutiny is 2010′s “The Adventures of Ook and Gluk” by Dav Pilkey, who has apologized, saying it “contains harmful racial stereotypes” and is “wrong and harmful to my Asian readers.”
The book follows about a pair of friends who travel from 500,001 B.C. to 2222, where they meet a martial arts instructor who teaches them kung fu and they learn principles found in Chinese philosophy.