a book by David Petty
In these pages you will find over 100 inventive variations around a circular theme using modular origami
If I were to describe this book in as few words as possible, I would choose these: easy, modular, organic origami. Easy, because the folding instructions are very clear and each of the pieces can be made in a few minutes by people with none to very little knowledge in origami; modular, because you create the models by assembling several small identical units together; and organic, because the result is a whole which looks much more complex than the sum of its parts: actually, many of the spiky stars and rings remind me of living sea stars and urchins. I came to this book after having seen several models a friend of mine had done, and I recommend it to anyone interested in any of the key themes mentioned above, as it will be a pleasing and rewarding discovery.
Update: I just found out that the author has made available several models with instructions here.