Robert Yost is a professor emeritus in the Philosophy Department at the University of California Los Angeles. He describes his collection as being due to a bizarre interest and that he has been fascinated unaccountably in the subject for many years. The collection contains probably the five most important texts on roof climbing and a small amount of correspondence related to this topic.

Robert Yost is a professor emeritus in the Philosophy Department at the University of California Los Angeles, specializing in metaphysics, epistemology and the history of philosophy. He describes his collection as being due to a bizarre interest and that he has been fascinated unaccountably in the subject for many years.

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