i cant believe i overlooked such a perfect book for such a long time. I been searching every material to get a thorough knowledge of vhdl but never seen like this for a "beginner". most of us in college try to learn vhdl by tutorials i guess, but they are never enough. By the way, i must mention that this is not the book you learn digital design concept. This is just for the vhdl part- which is the best-. If you are a complete starter i recommend you to this order: study the digital design book of wakerly along with this book. and when you are ready to take a next step get the second amazing book "the fpga prototyping by vhdl examples"