What an amazing game that was. I've never played the previous games or read much of the books, but that didn't prevent me from loving the absolute hell out of this game. It made me laugh, it made me sad, it made me excited, and most of all it made me interested in exploring the world and meeting the characters just to see what sort of whacky adventures Geralt would end up in next. I even enjoyed the combat, which was a real negative for some people!
Since starting it, I've also purchased the whole book series and recently finished the first one so I suppose I've got those to look forward to as well as the DLC!