No need for “The Ultimate Guide”, as each junk journal is unique and creative — a way to “record memories, thoughts, and inspiration.” Different than scrapbooking. You may write your own guide as you collect and paste meaningful ephemera, etc. As usual, I will take backup pictures of my journal to digitize it … in case it gets tossed in the trash.
What will grandchildren learn when discovering it? How to have fun journaling?