Original concept, nicely executed. Mr. Fowler has never been as good since and that's a shame. The universe he imagineers in ROOFWORLD is enticing and believable. The city of London contains many secret places and Rose and Robert come to know some of them, putting themselves in grave peril. Catchy from the opening pages, a thriller with a good head on its shoulders. ( )

A fantastic book. I've had it years, read it loads of times and can never put it down. ( )