Engineering a Compiler 2nd edition, by Keith D. Cooper and Linda Torczon
The dragon books are better used as references to those who are already familiar with all of the high-level concepts in compiler writing.
Modern Compiler Implementation in C
By A. Appel? I heard that the ML version is better since much of the code apparently isn't very idiomatic (It was supposedly translated directly from the ML book). I would probably recommend both that and The Dragon Book, as they cover roughly the same material but in a slightly different manner.