Yi Mao Zedong sixiang wei wuqi pipan jiu shijie jianshe xin shijie

以毛泽东思想为武器批判旧世界建设新世界

The Little Red Book features quotations from Mao's writings. It is small and bound in a red plastic cover so you can always carry it with you. A good Red Guard knows the book by heart and rarely reads anything else.