This book presents Cildo's work, focusing on his "studies". A great part of his most relevant works are shown here not only through photos of them in exhibitions, but also through Cildo's drawings and sketches, which allow us to see his processes of creation. In here, there are well-known installations such as Eureka / Blindhotland, Malhas da Liberdade, La Bruja and Desvio para o Vermelho, Através. There are also some of his less known works, never before gathered in a book. Another highlight of the book is a selection of 12 fundamental texts about Cildo's work, written by critics from all over the world, throughout his career, from his first exhibition in 1969 to 2017.