Blackstone and the Scourge of Europe is a 1974 historical thriller novel by the British writer Derek Lambert, published under the pen name Richard Falkirk. It is the fourth in a series of six novels featuring Edmund Blackstone, a member of the Bow Street Runners in the pre-Victorian era. It is 1820 and George IV orders Blackstone to the island of St Helena, where the imprisoned former French Emperor Napoleon may be plotting to escape. Source: Wikipedia (en)