This is a short book by Jake Arnott of The Long Firm and He Kills Coppers fame. I've not read or seen anything of his before but I'd heard good things, especially about the research and the period feel. It's an historical story, the meeting of Major-General Sir Hector Macdonald and Aleister Crowley. The first guy is the man on the Camp Coffee jar and a hero in Scotland, the second, well you know.

It's a good book technically, the story is well told and the characters work, including the secondary characters such as Baden-Powell and Astrid but it never really gets going and as such is too insubstantial. But as it's short it's still worth a few hours on the bus.