Do you usually read all the way through a module before you run it?
Is your answer different if it's a mega dungeon with like three hundred rooms?
I definitely read all the way through a module before running it. And then read and re-read it as I'm running it. For me, in order to really do justice to a module and bring it to life, I have to know it as well as an adventure I came up with myself.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.