I am looking to buy a book that was published in early 80s by Atari that features the 400/800 Home Computers line-up and has "NOT FOR SALE" printed inside a triangle on the top right corner cover. It is a small book and you should know which one I'm talking about because of the "not for sale" printing on its cover.
Please contact me at wvargas@hotmail.com if you have one to sell or know where I can find one.