The Day of the Djinn Warriors

When their father falls victim to a curse that accelerates his aging, twelve-year-old djinn twins John and Philippa join forces with their friends to venture into the spirit world. They are searching for the mysterious Faustina, the only one who can stop their mother from being transformed into the Blue Djinn. Along the way they discover a connection between a series of museum thefts and hauntings around the globe, adding an extra layer of danger to their quest.