The Boy Who Stole Time - Mark Bowsher

When 12-year-old Krish finds out his mum is dying, he is desperate to give her more time to live. This leads to a deal with a devil-like creature to travel to another realm, Ilir, and collect the Myrthali - the essence of time itself.

Ilir is a tiny desert world where the days are a handful of hours long and there is magic and treachery on every corner. Here Krish is set three impossible challenges by the brutal King Obsendei to win from him the Myrthali. He joins forces with the razor-tongued, young girl-wizard Balthrir, who hopes to free her parents from the Black Palace; a living, breathing structure built entirely out of those subjects who have incurred the wrath of the King.

But as Krish battles these impossible tasks he may be about to learn that there is more than his mother's life at stake as he gets embroiled in a blood-thirsty fight for power in Ilir that will push his friendship with Balthrir to its limits.