This book is a magnificent achievement.
I just want to gush about this book, but that won't do you any good. It is the very best in its field. Just start there.
Grunwald and Shepard have put together the definitive book on ways to tile the two dimensional plane. "Tiling" means covering the 2D universe with interlocking figures, so that no gap remains. Bathroom tiles do that, and patterns of brick on walls, and all of those wonderful geometries that the Muslim artists raised to their god in place of graven images.
That can not be enough for the very strongest of creative minds. The authors show the "Penrose tiles", that cover the world without ever repeating. Penrose used a five-way plan, which barely meets the needs of the world's symmetries. Amman used a four-way plan, like floor tiles, but created tiles that forever create new patterns. The pattern fills the world, but never repeats (except in detail). And then, there are the spiral tiles - perfectly regular, and different at every scale.
The artist will savor the richness of the plane. A mathematician will sink deeply into the many symmetries that turn THIS point into all points, or no other, or some, or all of the above. The student will struggle through the problems at the end of each chapter. Thoughtful readers will simply find themselves wandering away from every page, where some seed of thought blossoms in your mind.
I can not imagine how this could have gone out of print. I really can't. This book is the only one that covers its topic in !every! way. Depending on who you are, you must have it.