I downloaded this and intend to read it over the coming weeks - at 950-odd pages, it's lengthy. Dr. Bartle is still one of the best thinkers on this subject. A

I downloaded this and intend to read it over the coming weeks - at 950-odd pages, it's lengthy. Dr. Bartle is still one of the best thinkers on this subject. Also, his personal website is delightfully 90s-esque. https://mud.co.uk/richard/ https://mud.co.uk/richard/