There's a master criminal on the loose-with djinn-magic on his side! Theft, hauntings and red-hot mystery-it's a race against time for John and Philippa Gaunt to outwit the wicked Iblis. But can the magical djinn twins stop Iblis now he has woken the ancient warriors of a long-dead emperor from their sleep?

Djinn twins John and Philippa are off on another whirlwind adventure that takes them around the globe and into unknown worlds. And it's a race against time as they attempt to rescue their mother from her fate as the Blue Djinn of Babylon. An aging curse has been placed on their father and if the twins are gone too long, he'll rapidly become an old man. Meanwhile, museums all over the world are reporting robberies of valuable jade from their collections, as well as bizarre hauntings. As the twins and their friends travel around the globe on their rescue mission, they notice that something very strange is happening: An evil force has awakened the terracotta warriors created by an ancient Chinese emperor, and someone with very bad intentions has cast a spell possessing the soldiers with wicked spirits. And now, the very fate of the world hangs in the balance. Can the twins stop the mysterious terracotta warriors, rescue their parents, AND save the world before it's too late?

After getting help for their father, who is cursed with rapid aging, twelve-year-old djinn twins John and Philippa and friends travel through the spirit world in search of Faustina, the only one who can keep their mother from becoming the Blue Djinn, and discover a link to museum thefts and hauntings throughout the word.

From the NEW YORK TIMES bestselling author P. B. Kerr comes the fourth volume in this exceptional, imaginative adventure series about a brother and sister who discover they are djinns.Djinn twins John and Philippa are off on another whirlwind adventure that takes them around the globe and into unknown worlds. And it's a race against time as they attempt to rescue their mother from her fate as the Blue Djinn of Babylon. An aging curse has been placed on their father, and if the twins are gone too long, he'll rapidly become an old man. Meanwhile, museums all over the world are reporting robberies of valuable jade from their collections, as well as bizarre hauntings.

Twelve-year-old twins Philippa and John have more adventures when they become involved in an international adventure involving the Blue Djinn, the supreme arbiter of all djinn.

Three wishes. Two children. One incredible journey... Twins Jonathan and Philippa Gaunt live in New York. The early arrival of their wisdom teeth aged 12 coincides with an ominous earthquake in Egypt, and heralds strange dreams and a trip to London. There they meet eccentric uncle Nimrod, and he tells them the truth about their background.

When twelve-year-old twins John and Philippa Gaunt develop extraordinary magical gifts, they travel to London to meet their wildly eccentric djinn-uncle, Nimrod, who teaches them to harness their new powers and sends them on a mission.