Quote Originally Posted by johnbragg View Post
I've seen enough people say good things about 4E's monster systems. Does it get explained in the Monster Manual, the DMG, or is there a better source to understand what they did?
Monster Vault! (either of them). DMG1 has the explanation of the types and such, but how that stuff was applied changed over time. Monster Manual 3 brought about some big changes in math, but by the time that was printed a lot of your iconic D&D monsters had been done so the stuff in there is ... weird. MV goes back and retrofits a LOT of classic MM1 stuff with the things they had learned in the intervening years.