The Daily Quest: What Book Series Would Make a Great Game?

We trot this topic out every now and again. Truly, it never seems to get old, does it? With today's passing of Sir Terry Pratchett, author of the Discworld series among others, it seems a fitting tribute to a great author who will be sorely missed.

So today's question is a short one: What book series would you like to see made into a game? The genre of game is irrelevant. It is the sharing of great literature that would appeal to fellow gamers that matters most.