Bob Dylan's Rolling Thunder Revue of 1975 was unlike any other tour in rock history. His newest album at the time was Blood on the Tracks, and he could have easily packed arenas all over the country, but he opted to play a series of tiny theaters with old friends Joan Baez, Ramblin' Jack Elliott and Roger McGuinn with virtually no advance notice. At the same time, Dylan was filming his surreal movie Renaldo and Clara with many of the performers on the tour along with his wife Sara and Allen Ginsberg.\r\n\r\nAlong for the wild ride was the late photographer Ken Regan, who shot over 14,000 images. Only a tiny portion of them have ever been seen by the public, but selections from his archives can be seen in the new book Rolling Thunder: Photographs by Ken Regan, which you can buy right here. Here's a look at some incredible photos from Regan's collection.