This item has been stored in my parents' warehouse for many years. It is a set of two books. The cover of the Secret File has a signature from Hiroyuki Takano, who played Kentaro Shiratori in Barom One (see image 2). Both books are from the first printing. I have kept these items with care for many years, but please understand that there is some aging and minor scratches/stains. If you would like to see a specific part of the item, I will add more images.