"The Geometry of Four-Manifolds" by Simon K. Donaldson & P. B. Kronheimer is a textbook published by Oxford University Press in 1990. It is part of the Oxford Mathematical Monographs series and is geared towards the study of geometry, specifically focusing on four-manifolds. The book is written in English and is a reprint, featuring 450 pages of detailed content. With a hardcover format and dimensions of 9.5 inches in length, 6.5 inches in width, and 1.3 inches in height, this textbook is a valuable resource for those interested in the field of geometry and differential geometry.