An unprecedented retrospective in Brazil about the controversial Chinese artist, who will have the most extensive exhibition ever made, set up at Oca do Ibirapuera Park, in São Paulo, from October 2018 to January 2019. Ai Weiwei and the record of his creations in Brazilian lands, which mobilized artisans from the northeast. There are also two unpublished texts about his biography, his career and his experiences in Latin America and two interviews with him by the curator Marcello Dantas. The title "root" refers to the main raw material of the works that Ai Weiwei developed in Brazil. The book is bilingual Portuguese and English. Among Weiwei's best-known works is Finger, a gesture in front of great monuments in the history of China and the West. Iconoclast, Weiwei was famous for breaking or painting ancient Han Dynasty vases, considered cultural heritage sites in China, an attitude that updates the excesses of the Cultural Revolution in art.