I already had a copy of J.T.'s Hundredth, but it does have a Wold Newton Family tree chart in it (only the third book to do so following Phil Farmer's Tarzan Alive and Doc Savage, and done with Farmer's blessing), so it seemed worth picking up an extra copy.
The James Bond and C.S. Lewis books are, of course, duplicates, picked up for the unique covers on the British editions.
