The Doctor and Rose take a trip to 1920s london, and end up stuck there and entangled in a mystery, when someone steals the tardis.  
The story was really well thought out, very good as a mystery/whodunnit style that makes me want to read more detective novels!
I love the clockwork elements; the clockwork have been my favourite throughout the new doctor who series, it's almost steampunky.
I thought the characters were pretty well written, contrary to other reviews on this book, I really could see it as Doctor Nine and Rose.  Maybe it was well written or maybe I have christopher eccleston's voice stuck in my head?  
Anyway, 4 stars!
I'm glad I picked up the boxset, onto the next one!
See my other reviews of Doctor Who The New Series Adventures: | 
#2 The Monsters Inside →