Die Grundlagen der Einsteinschen Gravitationstheorie
by Erwin Freundlich, Albert Einstein, Foreword
$250 · Offered by Burnside Rare Books
First edition
Berlin: Verlag von Julius Springer, 1916. First edition. 64 pp. Bound in publisher's wraps. Very Good+ with slightly toned wraps, tiny stain to back wrap, slightly bumped corners, bookplate on verso of front wrap. An early German language work on Einstein's theory of gravitation with a foreword by the man himself. Freundlich's first book. Item #140945574
Found via Rare Books Intel, a search across rare-book dealers, auction houses and marketplaces worldwide.