This one is a pretty strong Ninth Doctor adventure that tackles more modern technology and intertwines it well with a sinister alien plot. I have to say that this novel really does a good job capturing the dialogue and feel of Series 1  - which only leads me to ask: why isn't Jac Rayner writing on the show? If you have to grab one Nine novel, this is a strong contender. Also has a great audiobook read by Camille Coduri.