After jumping head-first into the world of Doctor Who a few months ago, I quickly found that simply watching the show was not enough. I decided to take the plunge and start reading the novels too. This happened to be the book I chose and wow, I could not have picked a better one! Mike Tucker really knows his Ten, and Rose - their voices and interaction with each other are spot-on! The story itself is very well-written; it's scary, thought-provoking, and even funny at times, just as all good DW adventures should be!
I've since read three more of the DW novels, and have found that none of them compare to this one - in quality of writing, character development, or plot. If you're interested in getting into these books, this is certainly the place to start!