The novel «Between the Amur and the Neva» describes the events of 1883. In St. Petersburg, mysterious murders of pregnant women are taking place. Blagovo suspects that these events conceal preparations for some terrible crime. To find out, Lykov infiltrates the gang of the capital’s criminal “king,” Lobov. Disguised as a convict, the detective is sent under escort across all of Russia to the Nerchinsk penal region and then on to Manchuria, to the republic of gold prospectors, Zheltuga… At the same time, Lykov’s friend Baron Taube is fighting British intelligence in the Pamirs.