TOM OSBORNE, Cups and Balls Magic, undated reprint circa 1980's
60 page softbound booklet
Originally published in 1937, then updated in 1955, this C&B teach-in by Tom Osborne is surprisingly thorough and valuable to anyone wanting to learn the Cups and Balls, or to add a few more nuances and magical moments to their existing C&B routine.
Considering some of the very expensive tomes on this trick, this one is a super bargain. Look at the table of contents (photo) to see what I mean. The topics are well explained in text and clear illustrations.
I see this book listed elsewhere for $6. This book should sell for a lot more! But get it here for even less :-)