The Rhesus Chart

In a world where advanced mathematics can tear holes in reality and the British civil service quietly manages the resulting supernatural fallout, Bob Howard has seen a lot. But vampires? Everyone in the Laundry knows vampires don't exist — statistically impossible, empirically ruled out, case closed. So when a cluster of Canary Wharf bankers starts developing an inconvenient aversion to sunlight and an urgent interest in blood types, the situation is already complicated before Bob considers who inside the organization might not want it investigated. The stakes are personal this time in ways that cut deeper than any previous case, and Stross makes sure readers feel every layer of that pressure.

What makes this fifth Laundry Files installment particularly rewarding is how Stross plays the comedy and the dread against each other with real precision. The prose runs sharp and dry, full of bureaucratic absurdity and genuine menace in roughly equal measure, and the novel's structure keeps tightening the screws even as the jokes land. Readers who've followed Bob from the beginning will find the series mythology paying off in unexpected directions; newcomers will find a thriller that trusts them to keep up.