Richard Bartle releases his classic “Designing Virtual Worlds” book for free
I've cleaned up a scan of the original cover:http://www.mattowen.co.uk/files/DesigningVirtualWorldsCover....I did it for myself, so I could put it on the front of the PDF, but I thought I'd share it here also.As far as I am aware, the original book is long out of print, and second hand copies tend to cost quite a lot, if the rights have reverted back to Richard, as he says on his blog, then I'm guessing he's not getting any royalties these days anyway. That being said, I trust everyone here not to reprint the whole thing and sell copies at a profit!