Rated Doctor Who: Scales of Injustice: The Monster Collection Edition by Russell, Gary (2014) Paperback 8/10
A pretty solid Doctor Who book. It's a bit more violent, probably because it's a UNIT story, but we also get to know more about Liz, since her story never got a proper resolution on the show. I read this to my almost-10-yr-old son (skipping over the more gory details, as well as the 70s-patronizing comments about women in miniskirts), and we liked it a lot.