What is the worst thing that can happen when you are very nearly 12? For Max Foster and his 2 sisters, being made to learn things on the weekend is up there with the most awful of experiences.

Yet, here they are in Kensington Castle - the grand home of the enigmatic Sir Walter Cope - on the sort of tour that would make watching paint dry absolutely fascinating.

There is only one thing for it - to look for a distraction. And what better distraction than a door marked 'No Entry'? I mean, that kind of sign just means 'private' doesn't it? Surely there can be nothing extraordinary behind a door like that?

The Cabinet of Curiosities holds many mysteries and for Kira, Max and Chloe a dangerous adventure spanning thousands of years has just begun.