Riffle Shuffle Control 1979 Written by Karl Fulves 24 pages Spiralbound, Illustrated with drawings by Joseph K. Schmidt. 

Cover shows light general handling wear with mild surface marks and faint spotting. Minor corner creasing and slight rubbing to edges. A small area of discoloration / tape residue mark visible to lower right area. Binding intact and secure. Pages internally are  in good condition see photos .Overall,  presentable example with typical age-related wear.