The Hidden Man (2003)

"Christopher Keen, once a master spy, is murdered in cold blood. His sons Mark and Benjamin, though they hadn't seen their father for over twenty years, are now drawn into the legacy of his life as a spy as they set out to discover the truth and avenge their father's death. But as their search proceeds, more questions arise--is Christopher's death connected to his past life in MI6? Was his eldest son involved in a conspiracy that links him to Moscow, Afghanistan, and the Russian mafia?"-- Provided by publisher Mark and Benjamin Keen have not seen their father, Christopher, for 20 years. When he reappears hoping for a reconciliation, he has only begun to shed light on his shadowy past before being killed by an unidentified assailant. His violent death leaves questions unanswered. Was his murder an act of retribution? Had he been silenced for discovering a conspiracy involving Mark? Or had the carefully constructed facade of his past simply collapsed? As the truth unfolds, his sons must face the legacy of their father's life as a spy. Charles Cumming