Henry's mum and dad think his new friend Gary is BAD NEWS.

But Dad's got worse problems at work. If he doesn't win the charity go-kart race, he might lose his job!

There's trouble ahead, that's for sure. But nobody reckons on a mystery boy racer who turns up at the track. He's got a surprise in store for everyone...

Other titles in the series: YOUNG ROBIN'S HOOD; A FOOTBALLER CALLED FLIP; THE MAGIC SNEEZE; ALIENS STOLE MY DOG; WHIZZ THE FLEABAG.