This was a fine entry in the 'inspired by House of Leaves' genre. This is a fresher, more modern take which goes by the route of weaving gamer culture into the narrative as the plot engine instead of literary mystery.
It starts strongly, really picks up in the middle and then unfortunately has some issues at the end I found.
The execution here is pretty good. This whole genre relies on the unreliable narrator trope, you are never entirely sure if the narrator is actually experiencing what is recounted or if they are just mentally ill. It can sink a book if not handled with a certain deftness but it certainly is handled well here.
Whilst I thoroughly enjoyed this I do feel it fell to bits a little at the end. There was a degree of rushing it, a degree of a whole plot element brought in from left field and then totally abandoned to provide a sense of a 'happy ending' and it all just felt a little unsatisfying.
This pulled my review score down to a 4 (from a strong 4.5 through most of my reading).
It's still a recommend because I found it all very enjoyable despite the ending.