The Sharp and Niles books are quite frequently available at a reasonable from used-book stores like those at www.bookfinder.com. The Bronson book is very rare - if that's the one you got at Goodwill, Bert, I'm going to have a tantrum. Dover had a five-volume reissue of Child's original, complete work - that, too, is extremely rare. If that's the one Bert has, there may soon be a California-style burglary at the Bert household....
-Joe Offer-