There are a few rare and valuable books that could be considered the holy grails of gamebook collecting, and most of them are part of Joe Dever's Lone Wolf series. One such book is The Magnamund Companion, a full-color, large-format reference book featuring everything from a short solo adventure to instructions on building miniatures. Often found selling for ludicrous sums on eBay, it can now be downloaded free and legal from Project Aon, the official online home of Joe Dever's gamebooks. Just click on "The Books," and you can find the PDF file in the "Other Materials" section. Enjoy!