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Aru Shah tends to exaggerate a little bit in order to "fit in" at her prestigious school. Her classmates fly to faraway countries for holidays, and she spends all her holidays at the Museum of Ancient Indian Culture and Art, where her mother works. It is not surprising that Aru makes up all sorts of lies about herself. Once she said that an ancient lamp in the museum was cursed. And now her classmates are demanding to prove it.

"I'll light a small fire and blow it out!" thinks Aru, promising herself never, ever to lie again. But the consequences of her actions turn out to be more than serious - now she has to go to the Kingdom of Death and meet supernatural creatures... She will have incredible adventures in the world of Indian mythology: dangerous battles with monsters, secrets of the past and meetings with new friends. Will a twelve-year-old girl in Spider-Man pyjamas be ready for such a journey?"