Instruct: Classify the given Amazon review as either positive or negative.
Query: Review of Road to Reality

Road to Reality by Roger Penrose is well written and provides the reader with an introduction to the requisite math in the first 16 chapters. I have a doctorate in mechanical engineering with minors in physics and math and should be at home with about 85% to 90% of the math but will have to dig a little for the remaining 10% to 15%.The book attempts to address the "nature of things" that are so often taken for granted. I would also recommend a smaller companion volume by Brian Greene entitled Fabric of the Cosmos which covers much of the same material but without the mathematics. The latter should probably be read before or along with Penrose's book.