Night Residents

The first book in the series begins with a secret ritual taking place in a mystical temple in Istanbul, which draws not only human spies but also invisible beings' spies into an unusual intelligence war. A door to the mysterious realms is knocked on in this book. It will gradually open in the subsequent episodes of the series.

The Templars excavate in Baghdad to find the throne of Bilqis, the Queen of Sheba. Can't find what they're looking for. However, just as they are about to reach a stone tablet protected by demons, Josef McCaffrey, himself a templar, betrays his brothers and captures the stone tablet. When the Templars learned of this, Josef McCaffrey was summoned to Istanbul for a secret ritual and was executed by the Templars. Thereupon, the jinn police of Baghdad assign Egis to find the tablet. And he crosses paths with Manya, who works for Russian intelligence and was assigned to investigate the background of the murder of Josef McCaffrey...