This was a new direction for the Laundry Files. At times I really enjoyed reading Mo's perspective and reading about the literal demon's entrenched in her marriage, but much of the middle of the book seemed like fill to me, just a cycle of complaints about being overworked and minor superhero encounters. The superhero theme didn't really appeal to me in general. The concept sounds like a good one but in the end it didn't fit seamlessly into Stross's occult alternate universe.

I look forward to reading Nightmare Stacks as the ending of this book will surely have strong consequences for all the future installments!