Hello Prometheus.
The BDS DMC is excellent, and I was on the same course as Willie Gunn. Yes, there is an extensive reading list, and the two titles mentioned are good, in addition to Deer Management and Stalking by Richard Prior.
W_G got it right when he said read the Best Practise Guides, as these are an excellent source of information, and they can be downloaded free from the internet.
I was worried that I had not read enough before the course, but the training manual, and tutorials were first class, and by the exams, I was a lot happier with the knowledge attained. A brush up on map reading / Grid refs will also help you.
Practise shooting from various positions - especially those you do not normally use, ( kneeling / fence post etc ) and a few rapid fire evolutions aswell. Unecessary stress can be avoided if you are a bit happier that you have at least got a few practise runs under your belt.
It is a good five days, and well worth the investment.
All the best.
Neil.