The series Graded Readers for Chinese Language Learners is composed of 50 books, divided into three subseries, namely folktales, literary stories and historical stories, corresponding to Levels 1-3 respectively. 
 
Pilgrimage for Buddhist Scriptures tells the story of Monk Tang taking Sun Wukong, Zhu Bajie and Monk Sha as his disciples and going on the journey to the west with them.
Buddha in the west (India) has Buddhist scriptures which encourage people to do good deeds, so the Tang emperor sent Xuanzang to fetch the scriptures. On his journey, Xuanzang saved Sun Wukong from the Wuxing Mountain, who then became his disciple and agreed to escort him to fetch the scriptures. The Goddess of Mercy put a golden hoop on Sun Wukong’s head and taught Monk Tang an incantation of tightening the golden hoop. Whenever the incantation was recited, Sun Wukong felt a terrible headache, which forced him to be obedient. Later Monk Tang met his other disciples, the White Dragon Horse, Zhu Bajie and Monk Sha, one after another. Together they escorted Monk Tang to the west.