## The Road to Reality - further reading

There are many books that try to give a wide overview of modern physics, but none quite like The Road to Reality. The one I would mention is

*The fabric of reality* by

**David Deutsch**, which gives another Oxford scientist's grand view of the nature of the universe.

Penrose makes much of the 'magic' of complex numbers. *An imaginary tale : the story of √-1* by **Paul Nahin** gives a simpler introduction to this. I'm afraid it still requires a knowledge up to the later parts of school mathematics , but if you have this then I would think of it as a 'light' read.

If you want to follow up on the geometrical side of physics and have studied mathematics up to an advanced undergraduate level, then *The geometry of physics : an introduction* by **Theodore Frankel** would be a good book to work through. *Geometry, topology and physics* by **Mikio Nakahara** is at a slightly higher level and somewhat less general than Frankel's book.

### Quantum theory, gravity,...

Again, there are a huge number of books on the various interpretations of quantum theory.

*The undivided universe* by

**David Bohm** and

**Basil Hiley** introduces quantum theory and discusses various interpretations (including Bohm's of course) using undergraduate level maths, thus filling something of a gap between 'popular' books and research level works.

As for gravity, that is general relativity, *A journey into gravity and spacetime* by **John Wheeler** is a well presented non-technical book written by an expert in the subject. At undergraduate level *Relativity : special, general, and cosmological* by **Wolfgang Rindler** is a well laid out textbook. For those wanting to go further into the subject I would recommend *General Relativity* by **Robert Wald**

### ... and quantum gravity

Of course there's no definitive version of quantum gravity. If you want to learn about the

*semiclassical* approximation leading to predictions such as Hawking radiation then I would suggest the graduate level book

*Quantum fields in curved space* by

**N Birrell**.

As for the hot topic of String Theory, *The elegant universe* by **Brian Greene** gives a non-technical account. For those wanting to get into the subject properly there's *A first course in string theory* by **Barton Zwiebach**, which is based on undergraduate courses he taught.

*Quantum gravity* by **Carlo Rovelli** is a research level work on Loop Quantum Gravity. You can find a draft version of this book online, on Rovelli's website.

### and finally...

Note that Penrose has compiled a list of corrections to The Road to Reality at

www.roadsolutions.ox.ac.uk
. Eventually there should also be solutions to the exercises on the same site, but not at present.