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I am currently reading through Engineering a Compiler because I heard that The Dragon Book is outdated and doesn't cover many things.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?

>>5
Yeah...  I mean I appreciate the fact that a book on compilers of all things is necessarily going to be very technical and the subject matter not necessarily easy to fully grasp at first, but damn, do I really have to learn all that Set Theory stuff when these concepts could probably be explained in plain English too?  Does The Dragon Book or >>4's book contain a lot of this heavy mathematical notation like that too?