California Institute of Technology
Einstein Papers Project


Albert Einstein (1879–1955), one of the foremost scientists and public figures of the 20th century, revolutionized our views of time and space, matter and light, gravitation and the universe.

The Einstein Papers Project is engaged in one of the most ambitious scholarly publishing ventures undertaken in the history of science. The Collected Papers of Albert Einstein provides the first complete picture of Einstein’s massive written legacy.


Published Volumes

Online / On Paper

The Collected Papers of Albert Einstein series now covers Einstein's life and work up to his 48th birthday. It presents, as annotated full text, 484 writings by Einstein and 3,450 letters written by and to him. An additional 3,441 documents appear in abstract.

Einstein Archives Online

A unique resource: You can access our database of 90,000+ records of all known Einstein manuscripts and correspondence and also search the full text of 2,000 digitized items.



EPP Editor, Daniel Kennefick's book No Shadow of a Doubt out on April 30th

Kennefick Book Cover; shows eclipse

Daniel Kennefick is associate professor of physics at the University of Arkansas, Fayetteville and a contributing scientific editor to The Collected Papers of Albert Einstein. He is the author of Traveling at the Speed of Thought: Einstein and the Quest for Gravitational Waves and a coauthor of An Einstein Encyclopedia. Kennefick's forthcoming book, No Shadow of a Doubt: The 1919 Eclipse That Confirmed Einstein’s Theory of Relativity tells the story of the thrilling and contentious scientific expeditions that ushered in the era of relativity.

In 1919, British scientists Arthur Eddington and Frank Dyson led extraordinary expeditions to Brazil and Africa to test Albert Einstein’s revolutionary new theory of general relativity. Their subsequent confirmation of his dramatic prediction – that the path of light rays would be bent by gravity – catapulted Einstein to global stardom. Today, Einstein’s theory is scientific fact. Yet the quest to “weigh light” by measuring its gravitational deflection during the May 29th solar eclipse has since become clouded by myth and skepticism. Daniel Kennefick’s No Shadow of a Doubt provides definitive confirmation of these events through a combination of first-hand accounts and authoritative analysis to show how expedition scientists overcame war, bad weather, and equipment problems to test and prove one of science’s most fundamental theories.


Announcement prepared by Sara Henning-Stout, Senior Publicist, Princeton University Press.

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