I only know the bit where he escaped from the school in Pretoria during the Boer War.....and THAT is only because of research as to what was going on and how a distant cousin of mine (British) was found and stopped by the Boers - at a place out in the country, on the route Churchill took to get away.
The escape was in all the papers, and I think my cousin (who was 14 at the time) got separated from his family in the war, and tried to copy Churchill, as it was the next week!
Not generally interested in battle-type history, but a connection makes it feel different. I wouldn't bother to read the book, I don't think.