Anyway, one of the things I like about the training is that it is explicitly not a martial art. It is about self defence not about some sport or esoteric method of movement or philosophy. Gross motor skills and simple movements that you could recall in the stress and adrenaline of a confrontation; hit hard - sometimes pre-emptively - and get out of there.
In the spirit of this approach I've been reading Get Tough by W E Fairbairn. This was the standard close combat manual of the British Commandos in world war two. The principles are the same: hit hard and viciously.
You can buy the book at amazon or it is also available as a pdf for free
Fairbairn is fascinating.
William Ewart Fairbairn (1885–1960) was a British soldier, police officer, and exponent of hand-to-hand combat method, the Close combat, for the Shanghai police between the World Wars, and allied special forces in World War II. He developed his own fighting system known as Defendu, as well as other weapons tactics.
Here is a classic video - poor quality, but you can see some similarities with the Krav Maga approach.