WARNING: DO NOT GIVE THIS BOOK TO YOUR OWN GRANDMA. SHE MIGHT GET IDEAS...

Danger is her middle name!

Ollie's dad is missing - but Grandma Dangerous is on the case! She has a hot-air balloon, thirty packets of biscuits and a pooch with magical powers (she says).

But as they sail through the skies, Ollie realises they're not just on a rescue mission...

Grandma's on the run!