I've just finished reading Doctor Who: Human Nature
by Paul Cornell, the novel that the recent TV story Human Nature/The Family of Blood
was based on. Interesting, and in many ways better than the TV episodes, especially the aliens.
The Doctor: There's one thing you never put in a trap, if you're smart, if you value your continued existence, if you have any plans about seeing tomorrow, there's one thing you never, ever put in a trap... Me.
-Doctor Who: The Time of Angels