Book 19 on my Kindle, The Atrocity Archives by Charles Stross.
Good, funny, fast, mundane-occult-scifi with flashes of usefully thoughtful bits.
This is true:
"Cybernetics and game theory won them the Cold War, so paying for philosophers is militarily more sensible than paying for an extra company of marines, don’t you think?’
And this:
"Let’s not get too technical without a whiteboard"