LONDON (AP) — Britain is wracked with anxiety about national decline, Russians are meddling, and relations are strained with the U. K. 's American cousins. Cold War tensions with modern parallels ripple through “The Taper Man,” a new spy thriller set in the world created by the late John le Carré, and written by his son, Nick Harkaway. The novel sends British spymaster George Smiley to the U. S. in 1965, chasing a Soviet agent and negotiating a culture clash with “The Cousins,” le a...