Meh The adventure starts out ok, but I found it never really delivered. It was started and finished without really GOING anywhere. Martha seemed fairly flat and shallow (she never was the greatest of companions, but this made her seem worse) and while the Doctor was. . .well, mostly in character, he never really got a chance to shine either.
All in all, the story seemed more like a short story one might find in a magazine, than a full blown novel.
Not *bad*, but definitely not one of my favourites.