Around '93 or so, my friend had a cool D&D supplemental book that was laid out almost like a D&D Sears Catalog or something like that - it was set up as an inventory of a bunch of items and weapons and stuff being sold out of this store. There were also greater items, including some Da Vinci-esque creations for walking on water and a diving bubble and so on.
Anyone remember what this was? I feel like it was named after the “store” or proprietor or something like that. It was smaller, paperback-sized, rather than the size of a normal D&D supplement book.