The first edition of this pediatric textbook in Spanish was published in 1921. The present book is the fifth edition. It contains the usual subject matter found in such a volume and compares favorably with any pediatric textbook published in England or America at the present time. It is well organized, systematic and well written. The illustrations are well chosen. New and amplified material is given in chapters on the vitamins, infant feeding and bronchiectasis. Parts that have been amplified are discussions of the action of sulfanilamide and its derivatives, of treatment of pleural effusion and of choriolymphomeningitis. These amplifications bring this excellent textbook quite up to date.