One day in 1901, a young farmer from Croatia set out on a walk. Decades later, he was still walking, had traversed six continents, and had stood face-to-face with the most famous people of the age. His mammoth autograph book, lost to history for nearly a century, has resurfaced to tell the tale of Joseph Mikulec and his eccentric quest.

Guests:

Rebecca Rego Barry, author of "Rare Books Uncovered: True Stories of Fantastic Finds in Unlikely Places" and editor of Fine Books & Collections magazine. She wrote about Mikulec's odyssey for "Smithsonian Magazine."

Nathan Raab, rare book collector, Philadelphia, PA