The Little Blue has two pages of hand gestures. Firstly the co-author and I decided which gestures we wanted to include. Then we borrowed Zach's flatmate Nicola to demonstrate them while I took pictures; by the end of the afternoon we were all rolling around in stitches. The pictures were sent to Germany of all places, as we'd heard of a graphic artist who was good at drawing hands. He did the drawings with little red arrows to indicate the movement of the hands. It's become one of the most commented-on sections of the book.
In January this year I came across a whole book of gestures, with black and white photos and explanatory text in Italian and English. It was a reprint of an Italian publication originally made in about 1960. I think it was called 'I Gesti Della Communicazione' (Gestures of Communication).