I have both of the superbike 90 and 91 books by gary pinchin and kel edge
some great photos I have to say
The 91 edition I have has the photos of the top 10 and the world champ page (Raymond Roche) all signed by the riders
I only know of 1 other copy that was signed by all, as i took both copies around the paddock for myself and adrian gorst who has been a race engineer with honda britain for some years now, but in 91 we were Terry Rymers engineers for the Loctite team
I wonder if they will be worth anything in later years?