Michael Gilbert 
Ring Of Terror [PDF ebook] 

The infamous Siege of Sydney Street forms the author’s background to this gripping novel. Luke Pagan, a young ambitious and Russian-speaking police officer is co-opted by the security services to observe Russian revolutionaries who are wanted by the Ochrana, the Tsar’s secret police. It is known they are involved in terrorism, but proof is needed. Robbery, murder, arson, torture and blackmail are rife and an East End jewellers has been ransacked and following a fire in Sydney Street the bodies of two terrorists are found. Pagan and his somewhat unorthodox partner, Joe Narrabone, investigate.