An old book for a grand old building, this has been a best-seller for nearly 35 years. The paper version has been through several revisions; it’s for sale in Yellowstone National Park visitor center bookstores. A new, enhanced iBook for iPad is sold at the iTunes Store. It’s the original book and lots more, with interactive pages, hundreds of added images, architectural drawings, and even an 1899 movie by Thomas Edison. The cover and sample pages are below.