I am writing books on physics and math in English, and part of the books are available at my homepage http://youngsubyoon.com
I want to "test" my books before publishing them. I want them to be books suitable for self-study. If you want to study physics and math for free through my books, let me know.
I have a bachelor's degree in physics from Harvard university, and a master's degree in physics from Seoul National University.
My email address is ipho98 at naver.com.