I did a Google search and found some shops that sell bikes with that fork, but nothing in regard to a manual. Does the book you bought have a chapter on suspension forks? I'm not familiar as to the internals of that fork, but I'd say that it's probably a pretty simple setup. Do a search and see if a shop in your area sells bikes with that fork installed. Maybe they have a hang tag or something that came with the bike that would tell you more.