This book is an outstanding addition to our knowlede of the life and work of this great Spanish painter. Picasso himself collaborated in its production and was responsible for checking the fidelity of the 44 colour reproductions it contains. He selected the painting which we are reproducing on the jacket as well as making special designs for the cover. He was greatly interested in another unique feature of the book: the Classified Catalogue, in which literally hundreds of his works are illustrated and arranged according to type and period. He has been most active in its complation, with the result that it appears in an order and with a completeness that we can safely call definitive; it is an objective survey, but one which also contains Picasso's personal view of his development.