The book is the outcome of a six-year process of research, documentation, registration and study around the work of Xul Solar (Oscar Agustín Alejandro Schulz Solari, 1887-1963) from the holdings belonging to the FPK which, added to the permanent collection of the Xul Solar Museum, integrates a body of works covering from 1913 till his death in 1963. The selection comprises watercolors and tempera, gouache and ink drawings and sketches (some in wood or paper and mounted in carton), assemblages (including intervened pianos) and documents and notebooks related to his work, art and music. This second edition "updates a task performed over the course of years and makes available to the public a document unique and vital to cultural patrimony" --page 170.