Digital Design Books

Links to digital design books that are available, if you've used one, please let us know how you found it so we can add some comments below each.

Digital Design - Principles and Practice
by john f. wakerly
prentice hall
http://www.ddpp.com/
A good book, part of the xilinx library, and includes a copy of foundation student edition (limited to 20,000 gates) development software.