Second clue from third puzzle (“The War Machines”):

Dodo believes that the attack will come at sunset, while Ben thinks it will be six hours later, give or take.

I didn’t finish reading this yet, but I think it will be a nice distraction in idle hours (such as they are): a set of 61 logic puzzles, of the type that I loved when I was eleven or twelve, each based around a classic or modern Doctor Who story. I did the first two and found that they had pleasing subtleties. Here’s the grid from “The War Machines” to give you an idea of what it’s about:

An ingenious wrinkle on an old format. You can get Whodle here.