The classic books on compiler design are
"Principles of Compiler Design" by Alfred V. Aho and Jeffrey D. Ullman. It's been around quite some time now and its pink knight and green dragon are well known to at least a couple of generations of CS students.
Also...
"Compilers: Principles, Techniques, and Tools" by Alfred V. Aho, Monica S. Lam, Ravi Sethi, Jeffrey D. Ullman
If you're interested in writing a compiler then these are undoubtedly the best places to start.
