It took me a while to decide what I wanted to write about this title. In some ways I was very impressed, but in others I wasn't. The book itself is interesting, as it discusses Origami in terms of geometry; something that I had understood from my reading on the art that it had been used to teach children in Japanese schools. The notion of three dimensional forms, their edges, faces, and points, is explained and may help the student visualize geometric concepts more clearly.
If you are an average practicioner already, the book's simpler designs may give you some concept of how modules are used to create larger products; some of the flower designs are lovely and not out of reach of those who've already done origami with some frequency. Better and simpler books with delightful designs based on this technique are available, like those of Fuse, Fabulous Origami Boxes, Origami Rings & Wreaths: A Kaleidoscope of 28 Decorative Origami Creations and others Origami Jewelry: More Than 40 Exquisite Designs to Fold and Wear and might be a simpler place to start.
For the more advanced practice origamist, this book may be very enlightening if you feel you have run out of challenges. Certainly if you wish to design your own models, it would be helpful, especially those using multiple parts in one or more shapes. Visualizing the part that such shapes take in the final product will definitely take a little practice as it isn't necessarily quite as straight forward as one might think. Developing the skill to see a module in a different light might help one create other novel patterns using it.
This is not, however, really a book that the beginner would be best to start his or her own practice of the art. Most of the designs are "fussy" by virtue of the sheer number of modular parts required to complete them. What is the strong suite for an advanced practitioner becomes the bane of the beginner: visualizing how the parts interact when it isn't very clear cut.
From the point of view of a pattern book, some of the designs are quite lovely, particlarly the flowers and the triangle pyramids, but many are messy looking and seem to have been designed simply to prove that one can carry anything to an extreme. This is especially so with the last designs in the book which carry the geometric aspect of origami to higher and higher levels in something of a competitive context. Increasing the number of plains and parts for geometric designs apparently assures one a place in the history of origami. If this is your desire, the book is for you. If you just want some nice designs or instruction in how to do origami, it probably isn't. In general I preferred the author's other book, Marvelous Modular Origami, which also has polyhedra, but which seems to show a little more restraint. Here too, however, the book is probably not for a beginner.