Introduction to Differentiable Manifolds by Lang, Serge, 1962, Hardcover, Ex Library. This book is in good condition. This is a former library book. See pictures for condition. I do try to be conservative when I list condition, so likely better than I list. Even though this is former library, overall good shape! The normal library markings, besides that, pretty nice. I take photos of actual book so you can see what you are getting.