This book is a collection of a couple of hundred plates of geometric patterns. Each pattern has a section with dotted lines over the solid lines of the designs, to make understanding their construction and underlying maths easier. This makes it ideal for making your own, as I'm now doing, but this is by no means easy... There is no accompanying text to explain what you're looking at or how it was arrived at, so you have to work it ALL out for yourself. While this is great fun if you're me, it might not be if you just want the result, not the mental challenge of arriving at it.
Or you could just get it because it's gorgeous and never try and copy any. It's black and white linear forms only, but my goodness staring at these images is a trip!