Charles Stross' Laundry Files books are always great fun to read, and this latest one is no exception- in fact, for me it's the best yet. If you've read the others (and if you haven't, I'd recommend starting with The Atrocity Archives, although Stross does do a good job of making each one self-contained), you'll know the drill by now - spy thriller meets Lovecraftian horror, and of course, hijinks ensure. The main series' protagonist, Bob Howard, is joined in this instalment by two 'external assets', who are fun and fascinating characters in their own right. Highly recommended.