Ganson, Lewis: Patrick Page's Cards to Pocket ©1981 Supreme Magic Co., Bideford, England Softcover, saddle-stitched, 8x10", 4 pages

Image courtesy eBay seller RodsCuriosities

Comments: From the cover, "Like Ghosts, they pass up the sleeve and into the pocket"

Contents (courtesy Denis Behr's Conjuring Archive):

2 Patrick Page's Cards to Pocket
3 - Showing Trouser Pocket Empty
3 - Buckle Count Variation