Writing as: A. J. Quinnell
According to Wikipedia: "Nicholson traveled throughout his life and several of the minor characters in his books are based on real people that he encountered in his travels. Nicholson was married three times; his last wife, Elsebeth Egholm, is a Danish mystery novelist. The couple maintained residences on the island of Gozo and in Denmark.
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 (who is also J. K. Rowling's agent) told him he could use a pseudonym.[citation needed] The author chose "Quinnell" after rugby union player Derek Quinnell and "A. J." from the initials of the bartender's son.[1] Nicholson frequented Gleneagles bar in Mgarr, 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. He also sponsored a local Gozo soccer team and was admired by the Gozitans."