That book looks great, thanks! I've been reading:

High Speed Digital Design: A Handbook of Black Magic by Johnson and Graham:

http://www.amazon.com/High-Speed-Digital-Design-Handbook/dp/...

and RTL Hardware Design using VHDL by Chu:

http://www.amazon.com/RTL-Hardware-Design-Using-VHDL/dp/0471...

(the latter for designing for FPGAs)