Or, to give it its full title, War by Timetable: How the First World War Began.
I've been in London all day at a security conference, and like an idiot I forgot to stick a book in the bag (alongside the two laptops, iPad mini and notebook). So I figured it was about time to catch up on the collection of assorted free Kindle books I've been picking up on the iPad.
Wasn't sure what to expect of this, having not read anything by AJP Taylor before, but it was fairly short, so I figured I could get through it easily enough. Very pleasantly surprised - it's a fascinating discourse on the progression of actions from the assassination of Archduke Ferdinand (an event that one of my favourite books calls 'a cloud, no bigger than a man's hand') through to the British declaration of war (which will be 100 years ago just before my birthday next year). Very clearly written, with some intriguing insights into what was going on behind the scenes, and I learned a lot.
It was free when I got it, but with hindsight? I'd have gladly paid the £1.99 it is now, brief though it is.