Deeba and Zanna discover a wheel in a basement, Zenna turns it and realizes that something weird is happening - London is being switched off! Zanna and Deeba are two best friends and they find themselves in the world of UnLondon, a place where London's discarded things somehow end up. UnLondon is under siege by the sinister Smog (a poisonous cloud) and is waiting for its saviour to arrive as prophesised by their magic book that can speak. Guided by this book the girls have to try and put an end to the poisonous cloud. A crew of UnLondon locals, the likes of which you will have never dreamed, joins them in their quest! UnLondon is more than a little unusual but an absolute wonder to read about.
If you love Neil Gaiman (especially Neverwhere), Terry Pratchett and Lewis Carroll then this book will be a particular delight for you