For your consideration is this is a set of Yellowstone National Park stereoviews and book published by Underwood and Underwood circa 1909. The set includes 30 different views taken form inside Yellowstone. The book serves as a guide for each of the views with a brief description of where each was taken. The book also contains a map with each of the views marked. This is a RARE piece that includes a complete set of stereoviews as well as the guide. The stereoviews and book are in good condition with no obvious signs of damage and in good display condition. The measurements of each stereotype 7" x 3 1/2".