Where can I find info about engines in general

I want to learn to work on my cars motor a bit more an I am curious if there are any good sites that explain how they work and what everything does. THird gen specific would be great. THanks!.

thirdgen.org

also, look for a Chiltons book that's specific to your car. I have a 1986 Z28, and bought a Chilton's book for it and it explains everything from maintnence, to codes, vins, methods, diagnostics, everything.