I always enjoy books about treasure hunts, and that's basically what this book is about. Oh, it's tech-based and there's a lot of not very interesting guff about alternate dimensions, but it's a treasure hunt. Follow the clues, get the prize. And because I enjoy books about treasure hunts, I enjoyed this, but even so it's quite long, quite unfocused, and has a lot of handwavium about dimensions that I suspect is supposed to be compelling but just comes off as a bit annoying, really. 

The thing is, I really do like the core idea: a treasure hunt, increasingly dangerous, that's based on connections and conspiracies, and where it's difficult to tell if the protagonists are on the right track, or if it's just gullibility and mental dysfunction that's causing them to see connections, see coincidences, where there are none. That's such an ambiguous adventure, one that's entertainingly destabilising and verges on the horrific. But, as I said... there's all this other extraneous stuff leeched onto it, and as much as I like treasure hunts, I really don't care for the cosmic threats and merging universes and so forth. It doesn't make me see the story as mysterious, it makes me see it as cluttered, and not in an appealing way.

I do love that cover, though.