Grandma Dangerous and the Egg of Glory

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

Grandma demands justice!*
*And also all the teacakes

A priceless artefact has been stolen in Russia - and Grandma Dangerous wants to find it. Nothing will stand in her way - not even some poisoned caviar, a prison break or a spot of contemporary dance. Can Ollie and Grandma return the treasure and get back home, before being caught by the politsiya? Or - worse - before Mum finds out?