The Designer's Guide to VHDL (Systems on Silicon) (Volume 3)

FPGA Prototyping by VHDL Examples: Xilinx Spartan-3 Version

VHDL: Basics to Programming

Computer Organization and Design: The Hardware/Software Interface (The Morgan Kaufmann Series in Computer Architecture and Design)

Circuit Design and Simulation with VHDL (MIT Press)

The Art of Electronics