I am huge fan of Charles Stross' Laundry Files SF series (well, in fairness, given my physique I'm a huge fan of anything of which I'm a fan, but let's not go there). Only July 1, The Rhesus Chart (Laundry Files), the latest installment will be published. I've already pre-ordered my copy. Given the very positive starred review it just got from Kirkus Reviews, it looks like you should too:
Laundry regulars by now will be familiar with Stross' trademark sardonic, provocative, disturbing, allusion-filled narrative. And, here, with a structure strongly reminiscent of Len Deighton's early spy novels, the tone grows markedly grimmer, with several significant casualties and tragedies, perhaps in preparation for Angleton's feared CASE NIGHTMARE GREEN.
Stross at the top of his game--which is to say, few do it better. Pounce!