I've finished: And Put Away Childish Things by Adrian Tchaikovsky
After reading a couple of mediocre things I didn't bother posting about, I was reminded how much fun reading a master like Tchaikovsky can be.
(He also turns out to be a really good narrator).
Tchaikovsky manages to mix our reality with fantasy and sci-fi in a seamless way.
The protagonist is both clueless and steeped in the mythos. A setup that allows Tchaikovsky to create a more detailed fantasy world and a deeper interaction between Harry and the alternate universe.
https://app.thestorygraph.com/books/0dac5cdc-debb-4309-bf6c-85fd74e3885e