Prequel
The Ring of Solomon (2010) revisits the world created in the Bartimaeus Trilogy, although the setting shifts from modern London to Jerusalem, 950 BC. It follows the djinni's adventures during the reign of King Solomon, who was frequently referenced in the footnotes during the trilogy. It was released in the United Kingdom on 14 October 2010 and in the U.S. on November 2, 2010. The story revolves around the troubles Bartimaeus faced while attending to one of King Solomon's magicians, Ezekiel. Bartimaeus tricks one of the magicians to step out of his circle. In doing so, the magician breaks all protective barriers and is dealt with by Bartimaeus. Upon hearing this, King Solomon demands that Bartimaeus be brought to justice by the hands of Khaba the Cruel, a truly feared magician who doesn't show any kindness to his servants. Khaba has a loyal Marid servant named Ammet who, alongside Khaba, works to overthrow Solomon and seize control of Jerusalem. Meanwhile Asmira, captain of the guard of Balkis, Queen of Sheba, has been sent by her Queen to assassinate Solomon.
Read more about this topic: Bartimaeus Trilogy