A german book, 'Papier' by Franz Zeier is a beautifully presented book. black and white images and the occasionally simply presented diagram. it combines paper art with structural paper art and is inspirational.
I've looked through the book a number of times and am constantly finding new things.
I found this gem of a book at an op shop (amazing the stuff one finds in an op shop) It features few well-known classic designs and is mostly about practicality, although some of the designs are classic in their own way. these pages are from the chair section of the book and show just a few of the many folding and stacking chairs.