Doctor Who: The Monsters Inside by Stephen Cole. HC, 253 pages, BBC Books, 2005.
The Doctor is really making a habit out of landing on strange and probably unfriendly planets, but landing himself in a giant prison system is not a good idea. Particularly when he and Rose get captured and separated from each other and the TARDIS. Where the Doctor lands, there's some enemies he recognizes, and some he doesn't.
*Slight Spoilers* I really enjoyed finding out more about the Slitheen and their whole race. I liked that the characters played true to themselves even up to the end (and one character behaving strangely was reasonably explained). I am full of fangirlish squee at the fact that this book was mentioned in an actual episode of the show. A certain creature was definitely based off of The Prisoner. One of the nice features of the books is that they're able to 'show' non-humanoid aliens without busting the budget; I loved the bits where the Doctor was flirting with a lump of molasses with eyestalks.
This was fun, I liked but didn't love it. Overall recommended, especially if you have a craving for Slitheen or Nine.