The cover of the book 'Postdata' by Octavio Paz, featuring a geometric design with various shapes and colors, including blue, white, and black. The title 'Postdata' is prominently displayed in the top left corner, and the author's name 'Octavio Paz' is in the bottom left corner. The book is part of a series called 'Ediciones de la Fundaci\xc3\xb3n Juan March', which is indicated at the bottom right corner.