A missed opportunity. Unlike Bantock's earlier Egyptian Jukebox, here the puzzles are too easy to encourage close examination of the beautiful documents he assembles. Where that previous work told a series of interesting stories of a world in which reality was uncertain and meaning elusive, here we have a weak frame story and lazy puzzles shoehorned into a collection of scattered ephemera.
I mean, the puzzles were way too easy. More than once, having read the prompt, I didn't even have to unfold the document all the way in order to get the answer. In some cases, you don't even have to open the envelope, the contents being 100% red herring.
With a little more work, Bantock could have created a wonderful experience where connections have to be drawn between entirely different worlds of collected evocative materials, and attention has to be paid to their beauty and meaning. Instead, we have clearly-useless, pretty collages.
2 stars because it looks nice.