One-of-a-kind prototype created during the development of the published edition. Prototypes are produced to evaluate binding materials, structural elements, and design concepts prior to final production. In most cases, the binding design differs—sometimes subtly, sometimes significantly—from the version ultimately published.Some prototypes may share the same binding as the final production edition. The primary distinction is that all prototype books contain blank pages unless otherwise noted, and do not include an enclosure unless pictured. Each prototype includes a signed letter of authenticity. This prototype includes the following: Unsigned colophon (loose). Wrapped Hagen-Renaker penguin. Bonus envelope. A folded signature of the first 12 prototype pages, set in a typeface different from that used in the final edition. A random assortment of Royal typewriter keys in white and black. PLEASE NOTE: Prototype books may have one or more imperfections and/or defects and are sold as-is. Not eligible for return.