Jack Mattingly is a genius. But when his parents' car is hi-jacked, with him inside it, for once he's as clueless as the rest of us. The car-jacker doesn't know Jack's in the car-yet. But it's only a matter of time before he's discovered. And then, anything could happen . . .

Jack Mattingly is a genius.

He has an IQ of 170.

He speaks fluent Mandarin and Latin.

And he can calculate the square root of 1,673,549 in his head.

But when Jack's parents' car is hi-jacked, with him inside it, for once he's as clueless as the rest of us. The car-jacker doesn't know Jack's in the car - yet. But it's only a matter of time before he's discovered. And then anything could happen. Only one thing's for sure: Jack's in for the thrill-ride of his life . . .

A high-octane adventure from the winner of the Blue Peter Book of the Year Award.

'You have to like Ali Sparkes books. They're unashamedly good-hearted, energetic, and vivid.'

'Full of clever twists and genuine humanity'

'Another fantastic read from this gifted author, I loved every minute of it!'

'Great story-telling, with plenty to grab and hold the attention of the reader.'

'This book is so good I made my dad read it.'

'Ali Sparkes satirical thriller has spark and heart.'

'A thoroughly enjoyable and satisfying adventure story.'

'This mix of car-jackers, child geniuses and a brother called Stuart is something you will not want to miss.'