This book has a very detailed and complete coverage of the VHDL langauge. The book is clearly geared to the beginner and serves as a great tutorial on the language, however the depth is good enough that even a seasoned VHDL programmer will find it of good benefit both at increasing their depth in the language and also as a desk reference. My main criticism of the book is that I found it somewhat verbose in description on certain topics. While the detail is needed on the more complex or subtle topics, it seems to drag on with some of the more trivial ideas. In any case, the good clearly wins out in an overall must have VHDL reference.