PLOT SPOILERS In the end a very frustrating read. The premise is excellent, a post apocalyptic world reduced to medieval living standards, with the hint of a hidden repository that would enable the restoration of science and progress, which to be fair is realistically portraid. There are a few so so plot points half way through that as a reader you can " go along with " but the end of the book leaves an awful lot of unresolved relationships, and equally frustrating no real resolution of the repository that is perhaps to be found beyond a final unopened door. It is as if the author had a flash of inspiration but didn't think it all the way through. The book feels like the first part of an unfinished trilogy. So yes I enjoyed the journey, but ended up feeling as if I had been left at Clacton bus station without an onward ticket.