Michael está decidido a no detenerse hasta dar con los que destruyeron a su madre. Creasy, sin embargo, no se conmueve ante el deseo de venganza de su hijo adoptivo, hasta que conoce a una chica de trece años adicta a la heroína por obra del Círculo Azul, un cartel criminal que hace fortunas de las drogas y la prostitución. Comienza entonces una cacería humana feroz y despiadada... Círculo satánico es un thriller demoledor que combina con acierto tensión sostenida y el más crudo realismo.
A. J. Quinnell was the pen name of Philip Nicholson, a mystery and thriller writer. He is best known for his novel "Man on Fire", which has been adapted to film twice, most recently in 2004 featuring Denzel Washington.
When the author was preparing to publish his first book, "Man on Fire", he wanted to keep his real identity a secret. During a conversation in a bar, his agent, Chris Little, told him he could use a pseudonym. The author chose "Quinnell", after the rugby union player Derek Quinnell and "A. J." from the initials of the bartender's son.
Nicholson frequented Gleneagles bar in Mġarr, Gozo, the town where the Malta ferry disembarks. He could often be found drinking vodkas with soda. He wrote late at night and through until the morning, always standing up.
The author's best-known creation was the character of Marcus Creasy, an American-born former member of the French Foreign Legion.