Compiler books

I am currently reading through Engineering a Compiler because I heard that The Dragon Book is outdated and doesn't cover many things.  However, some sources tell me that The Dragon Book is still good even though it has aged.  What does /prog/ think?

I'm only in chapter 3 but finding it interesting so far, but I'm getting tired of the mathematical symbols used to describe everything without any clarification for someone who doesn't hasn't spent a good amount of time studying Set Theory.
In a regular grammar, however, productions in P are restricted to one of two forms: α→a, or α→aβ, where α, β ∈ NT and a ∈ T.
Gee, thanks.

Also, are there any other books on compiler design that are decent?

Compiler Construction: Principles and Practice, by Kenneth Louden is said to be pretty good. I wouldn't know, I've had it sitting on my bookshelf for half a year now. Every night I am thinking to myself: Well, I could start reading now, but I never do.