This book has largely positive reviews. Some of the reviews point out a few weaknesses. But Logos doesn't seem to have a less advanced book on verbal aspects than what's in Stanley E. Porter's $60 book.
What do others think of the quality and usefulness of this book by Campbell?
www.amazon.com/Basics-Verbal-Aspect-Biblical-Greek/dp/031029083X/ref=pd_sim_b_6
Publisher: Zondervan
The book has been suggested once before: Re: Suggestion: Another Zondervan Bible reference dictionary