Simon Sebag Montefiore’s One Night in Winter begins in the hours immediately following the solemn victory parade that marked the Soviet Union’s victory over Nazi Germany — probably the high point of Stalinism. Two teenagers, dressed in 19th- century costume and members of a secret literary club called, aptly as it turns out, the Fatal Romantics, have chosen this moment, of all moments, to re-enact a duel from Pushkin’s Onegin on a bridge beneath the very walls of the Kremlin.