15 Forgotten Things Found Inside Books

Michael Popek, the owner of Popeks bookstore in Otega, NY, has been collecting and cataloguing the unusual bookmarks he finds inside the pages of dusty old books.
He created the Forgotten Bookmarks website to complement his career of bookmark collecting.

Bills from a Monopoly game. Found in “The Runaway Papoose” by Grace Moon.
Published by Doubleday & Doran, 1929

More at Messy Nessy Chic