Anyway, it's a decent start, with some homage to Alien, the Doctor and Clara joining a mixed crew taking their ship to solve a historical mystery, and discovering that the problem they face is much worse than they imagined; there is a good who's-the-real-monster subtheme. The first couple of chapters feel a bit self-consciously written for younger readers, but then it settles down. Clara doesn't get to do much other than sass the Doctor; the Doctor however is in good form, and this reflects the new confidence the TV show seems to have found of late.
Technically eligible for next year's Hugos, but I don't think it is accessible enough to a wider audience to have a realistic chance, and I'll almost certainly invest my nominations elsewhere than the Who books no matter how much I like them.