Neale, Robert E.: WhatsaBox ©1991 Robert E. Neale, Leeds Softcover, saddle-stitched, 7 pages

Image courtesy eBay seller JayAndLefty

Comments: "A simple box of cardboard turns out to be far from simple. First it has an open top and closed bottom, then two tops, then two bottoms - and a ball placed into the box finds itself trapped inside then just as mysteriously is released."

Contents (from web description):

1 Whatsabox
1 Credits
1 Construction
2 Routine