On Consistent Luck

How can the insurance companies keep on producing record profits when the economic theories of Professor Alfred Marshall and his protégé John Maynard Keynes suggest that this should be impossible when their prices can be easily compared? The Chancellor of the Exchequer would like an answer and commissions Sherlock Holmes to find out.

The great Baker Street sleuth and Dr Watson confront Mr. Peters, the CEO of Global Home Insurance, and the upshot is a change in the political landscape as well as Holmes's retirement to his beekeeper's cottage in Sussex.