Carl Jung's The Red Book is considered to be the most influential unpublished work in the history of psychology.

When Carl Jung embarked on an extended self-exploration he called his confrontation with the unconscious, the heart of it was The Red Book, a large, illuminated volume he created between 1914 and 1930. Here he developed his principle theories—of the archetypes, the collective unconscious, and the process of individuation—that transformed psychotherapy from a practice concerned with treatment of the sick into a means for higher development of the personality.

While Jung considered The Red Book to be his most important work, only a handful of people have ever seen it. Now, in a complete facsimile and translation, it is available to scholars and the general public. It is an astonishing example of calligraphy and art on a par with The Book of Kells and the illuminated manuscripts of William Blake. This publication of The Red Book is a watershed that will cast new light on the making of modern psychology.

More information on The Red Book: http://wwnorton.com/books/978-0-393-06567-1/

The process of digitally capturing the book was done by DigitalFusion. They are also responsible for this film showing the process. Learn more about DigitalFusion: http://www.digitalfusion.net/ (less info)