For Beginners:
* "VHDL for Digital Design" by Douglas Perry: Widely considered a classic and excellent for beginners. Covers the fundamentals of VHDL syntax, design methodology, and common design patterns.
* "VHDL Programming by Example" by Douglas Perry: This book uses a hands-on approach, focusing on real-world examples and practical applications.
* "Digital Design with VHDL: A System Level Approach" by David M. Harris and Sarah L. Harris: Combines VHDL with digital design concepts, making it suitable for those new to both.
For Intermediate/Advanced Learners:
* "VHDL Cookbook" by Peter J. Ashenden: A comprehensive reference book with a practical focus on real-world design problems and solutions.
* "The VHDL Language Reference Manual" by the IEEE: The official language standard for VHDL, providing complete and authoritative information.
* "VHDL Design: A Practical Guide to Digital System Design" by J. Bhasker: Covers advanced topics like synthesis, simulation, and testing, making it suitable for those looking to deepen their understanding.
Other Recommendations:
* "Digital Design with VHDL: A System Level Approach" by David M. Harris and Sarah L. Harris: This book is a good choice for those new to both VHDL and digital design.
* "VHDL and Verilog: A Practical Guide to Digital Design" by Charles H. Roth Jr. and Larry L. Kinney: This book covers both VHDL and Verilog, making it a good choice for those who want to learn both languages.
Tips for Choosing:
* Read Reviews: See what others have said about different books on Amazon, Goodreads, or other online retailers.
* Consider Your Learning Style: Do you prefer a hands-on approach with examples or a more theoretical and formal approach?
* Look for Examples: Ensure the book has plenty of examples and exercises to practice with.
* Check the Edition: Older editions might not be up-to-date with the latest VHDL standards.
Remember, the best book is the one that suits your individual needs and helps you learn effectively. It's also helpful to complement your learning with online resources like tutorials, forums, and documentation from FPGA vendors like Xilinx and Altera.