A CRITICAL MOMENT IN THE DISCOVERY OF GENERAL RELATIVITY: AUTOGRAPH LETTER SIGNED TO LUDWIG HOPF FROM 1913 WHERE EINSTEIN ABANDONS THE REQUIREMENT OF GENERAL COVARIANCE. More

FIRST EDITION, COMMERCIAL OFFPRINT ISSUE, of Einstein's important 1914 paper on the development of general relativity. More

FIRST PRINTING IN ORIGINAL WRAPPERS of one of Einstein's most important papers: his landmark work of November 18, 1915, containing the development and confirmation of crucial elements of his general theory of relativity. More

FIRST EDITION IN ORIGINAL WRAPPERS of one of Einstein's major papers on the modification of general relativity and the beginning of his unified field theory. More

EINSTEIN RESPONDS TO A STUDENT, EXPLAINING A CENTRAL TENET OF RELATIVITY. More

FIRST PRINTING IN ORIGINAL WRAPPERS IN FINE CONDITION of Einstein’s famous November 4, 1915 paper introducing his new version of general relativity. More

SCARCE FIRST PRINTING IN ORIGINAL WRAPPERS OF EINSTEIN’S REPORT OF THE CONFIRMATION OF GENERAL RELATIVITY; PRECEDING THE FORMAL ANNOUNCEMENT BY THE ROYAL SOCIETY AND ROYAL ASTRONOMICAL SOCIETY. More

EXTREMELY RARE AUTHOR’S OFFPRINT (“Überreicht von den Verfassern”) IN ORIGINAL WRAPPERS OF THE FIRST PRINTING OF EINSTEIN AND GROSSMANN’S FURTHER DEVELOPMENT OF THE CRITICAL “ENTWURF” THEORY OF 1913. More

UNPUBLISHED CANDID PHOTOGRAPHS OF EINSTEIN AND LETTERS BY WILLIAM HUBBARD OFFERING AN INTIMATE VIEW OF THE SCIENTIST ON VACATION. More

VERY RARE FIRST EDITION OF AN IMPORTANT DOCUMENT OF 20TH-CENTURY JEWISH INTELLECTUAL AND CULTURAL HISTORY. More

FIRST EDITION, FIRST PRINTING, IN ORIGINAL WRAPPERS of Einstein’s paper outlining a thought experiment to suggest that the uncertainty principle requires the acknowledgement of an indeterminate past. More