Just found this book and been reading it: http://www.amazon.co.uk/Domainers-Bible-Beginners-Selling-ebook/dp/B007824BA8 I can highly recommend this for anybody either new to domain trading or those thinking about getting into domain name trading. I hope people find this helpful.
I've found it's very much an industry that you can jump straight into. It's not rocket science working out which domains are more valuable e.g. .coms and domains that offer value through keywords. Selling is also quite simple if you're using the right services. No doubt the above is a good resource but there's plenty of free information available via the web and a bit of trial and error using your own logic. After all, domain trading is a bit of a gamble in the first place.