I downloaded it today, and what is awesome is that they provided as a FREE download not only the main rulebook but "Magick & Miracles" and "The Game master's handbook" as well, so what you can get absolutely fo free is the entire fourth edition of "Chivalry & Sorcery" fantasy role-playing game.
Sure, this is not the legendary 1st or 2nd edition, but if you have never tried this old fantasy rpg (published for the first time in 1977), you should really give it a try.
I regard Ed Simbalist as the greatest mind behind the rpg history, and if you are curious you can read what he himself thought and wrote about the differences between Dungeons & Dragons and Chivalry & Sorcery following this old post of mine.
If you don't download these three books for free, you know you are destined to hell in the afterlife.