Claim: In an Expensive Place to Die is a 1967 novel by Len Deighton, the unnamed narrator is told to leak to the Chinese information about the effectiveness of nuclear weapons, to bolster their deterrent effect, then the narrator does a deal with the French security services to bring together the Chinese agent with the American nuclear scientist in northern France.
Evidence: An Expensive Place to Die is a 1967 novel by Len Deighton. The unnamed narrator, a British agent, is told to leak to the Chinese information about the effectiveness of nuclear weapons, in order to bolster their deterrent effect. The narrator does a deal with the French security services to bring together the Chinese agent Kuang with the American nuclear scientist Hudson in a farmhouse in northern France, so that the information can be communicated.