I used this book as one out of four or five other books as a resource for a Sunday night Bible study series on the Holy Spirit. Out of all the resources I used, this one was my favorite. His overview was comprehensive, and his content was tightly and concisely woven together.
The book doesn't look like it is very "academic." It is rather short, and it doesn't really have many footnotes. Palmer doesn't cite many other works. However, his writing style is rich enough, that it will be a challenge for readers who are used to reading books with a lot of stories and illustration. I don't mean this as a negative for any type of reader. It is just an explanation of the type of book this is.
Edwin Palmer is strong in his Calvinism, and for the most part I didn't mind. In addition, there were a few times when I felt like his reasoning went a little too far from the core Bible concept. It wasn't bothersome, but it is perhaps noteworthy.