A pleasingly absurd caper where kids outwit crooks, ghost are let out of the bag, and grandparents refuse to behave!

From beloved and best-selling author Malorie Blackman. Grandma Gertie is rather strange. With her big square glasses and a parrot on her hat, Anna and Kasper don't know what to make of her.

But Grandma's got a secret… Grandpa Bert is a ghost and he's travelled all the way from Barbados squished inside her handbag!

Even worse, they're being followed and Grandpa Bert could be in very grave danger… Can Anna and Kasper help their grandparents before it's too late?

A hilarious family adventure filled with ghosts and laughs.