Hi, I'm looking for suggestions on what are the best areas of theoretical physics for independent/amateur research? I want to do some independent study with a view to research, but my problem is that I can get interested in more-or-less anything and am easily sidetracked. So I want to try to settle on a target that I can concentrate on with the aim of (in the distant future!) being able to publish something useful in an academic journal. Basically what I'm looking for is a field/topic which is: - Not too ambitious (string theory, quantum gravity, etc.). I don't think I'm the next Einstein. - Not overly dependent on experiment, or where experimental data is readily available. - Not changing too rapidly as even when I am up to speed, my progress is likely to be slower than a professional researcher's My background is that I have a first degree in physics, and a PhD in a related area, but I left science after that (10 years ago). I recently did a postgraduate MSc in mathematics in my spare time so I know I can study and can probably handle the maths required. I work in an academic institution so I have access to libraries and journal subscriptions. Any suggestions very welcome! Steve.