This Doctor Who book features the Nine Doctor and Rose trapped in a prison system where nothing is like it seems. Where human and aliens are experimented on and where both the Doctor and Rose face an old enemy. I liked this one a lot. It reads like a tv episode. You get the action, the angst of Rose being separate from the Doctor (with "I'll will come for you vibe). Overall, this is the strongest of the Nine Doctor set so far. I still have two to read.