I mitten av 80-talet gjorde Carl Gustaf Gilbert Hamilton entré på den politiska arenan. Han klev in som agent Coq Rouge i en tid som präglades av det kalla krigets slut, Sovjetunionens sammanbrott och kapitalismens seger. Ett skede på gränsen mellan det Sverige som var och det Sverige som sedan vuxit fram.Den svenska underrättelsetjänsten fick med den högt specialutbildade löjtnanten Hamilton tillgång till ett hemligt vapen.När en hög Säpotjänsteman blir skjuten i Stockholm kommer Carls unika kunskaper och talanger väl till pass. Under den utredning som följer riktas misstankarna mot vissa palestinska terrorgrupper, och Carl får rikligt med tillfällen att visa vad han går för …
Jan Oscar Sverre Lucien Henri Guillou (born 17 January 1944) is a Swedish author and journalist. Among his books are a series of spy fiction novels about a spy named Carl Hamilton, and a trilogy of historical fiction novels about a Knight Templar, Arn Magnusson. He is the owner of one of the largest publishing companies in Sweden, Piratförlaget, together with Liza Marklund and his common-law wife, publisher Ann-Marie Skarp.
Guillou's fame in Sweden was established during his time as an investigative journalist. In 1973, he and co-reporter Peter Bratt exposed a secret intelligence organization in Sweden, Informationsbyrån (IB). He is still active within journalism as a column writer for the Swedish evening tabloid Aftonbladet.
In October 2009, it was revealed that Guillou had been recruited by the KGB in 1967. The exposure of his activities came after the tabloid Expressen requested the release of documents from the Swedish Security Service (Säpo) and published information from the Säpo files along with information gained through interviews with former KGB Colonel Oleg Gordievsky about Guillou's case. The records showed that Guillou's involvement with the KGB continued for five years, until 1972.