Top-selling book Origami , also published as Teach Yourself Origami and Origami 1 is qouted as selling 750,000 copies in the 1976 impression by Coronet Books. The 1976 version was the 25th since the first impression in 1968. The last report I had was 375,000 sold. The sales of Robert Harbin's Origami books published by Hodder paperbacks exceeded 1 million by 1978. See BOS magazine, number 69.
Every spread is a superb example from a great graphic designer and paperfolder.
In the City Museum, Milan, is a map dating from ancient Egyptian times, which has crease lines showing it was folded in a similar way to modern maps. Complete Origami, Eric Kenneway, page 106. In Envelope and Letter Folding, third edition, page 4, edited by John Cunliffe, an illustration is given of a letter fold, dated 1670, from the Netherlands. Maying Soong gave diagrams for folding a Chinese pagoda bookmark using 9 squares of different sizes but all folded in exactly the same way. The boy was withdrawn and had difficulty communicating, so Gibbes showed him how to make something from a piece of paper.