Pillar of Rock

65 million years ago, an event forced the inhabitants of Mars to abandon their world for a planet close by. 1099 during the siege of Jerusalem, a Knight discovers a golden box. He returns with it to England and is safeguarded for centuries until 2014. Two factions seek the box; both have the desire to use it for their own ends. Their individual goals will result in the same outcome - the annihilation of mankind. Detective Inspector Mellissa Carlisle unwittingly joins the quest when she is assigned to a murder case. She then finds that she herself becomes equally sought after. 'Mel' teams up with a professor of History to solve the remaining clues leading to the location of the box.
From Derbyshire to Edinburgh Castle, they are pursued by the deadly Messorem, a group of highly trained assassins. The White House and Downing Street believe in the detective, and assist in the quest. She finally has to decide which course of action to take once she recovers the artifact
To save humanity or to save herself.