Download my free introductory physics text, with over 2000 pages in 5+1 volumes, written with LaTeX, from www.motionmountain.net. It is surprising, entertaining and captivating on every page. The volumes cover mechanics and thermodynamics, relativity and cosmology, electrodynamics and light, quantum theory, and motion inside matter. There are free translations in several languages, all available at the site as well.
Volume 6 is not textbook material, but a research text; it presents a speculation for a unified model that contains general relativity and quantum field theory. Its main prediction: the standard model of particle physics and general relativity are all there is in nature. www.motionmountain.net/research.html
Thoughts on the future of LaTeX are found on www.motionmountain.net/onlatex.html