He's hawking an updated book made from a 96 page fan magazine put out by Richard Gibbs in 1993. It was filled with game reviews, tips and codes, and short blurbs on games, hardware, and accessories;'twas very much a fan production with hand lettering, fan art, and collage compositing (note the yellowed cellophane tape in the above scan) and printed via xerox copying.
Though quite rough around the edges, the original is pretty interesting (it's in the turbob archives). Depending on price and quality of revisions, I'd be interested in buying an updated version, but only if Gibbs is involved and getting the lion's share of profits.