Jonathan Stroud- Bartimaeus- Ptolemy's Gate

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Two thousand years have gone by since the djinni Bartimaeus was at the height of his powers - invincible in battle and befriended by the great magician Ptolemy. Now he is trapped on Earth and treated with disdain by his master, Nathaniel.

Meanwhile, undercover in London, the fugitive Kitty Jones has been stealthily completing her research on magic and demons. She has a plan that could break the endless conflict between djinn and humans - but first she must uncover the secrets of Bartimaeus's past.

The Bartimaeus books are published in 35 languages and have sold over 6 million copies worldwide.