@retech
I'm going to leave it in the hands of the puzzlers to see how and where they take it. I'm gonna provide the books, the puzzles and the treasures and let them at it. I want everything to be offline, physical and tangible. What they do with everything is completely up to them.
I've got 9 treasure hunts planned out, a bunch of other different ideas on top of that, including collectibles, a choose your own adventure game, an album, and a way for people to engage more with libraries in the UK.
Any and all may or may not work, but that's part of the fun, right?
I just have to get my mailer out and my proof of concept out and I'll be in a comfortable place where I have walked the walk I've been talking for the last 6 months.