I've been using energy tapping for several years. I went through two of Gary Craig's courses, then began buying books on the subject for further (and different) information. Gloria Arenson's book is simply the best. The reviews here cover most of what I was going to say, so I'll just add a paragraph.
First, the author lays eveything out in a clear, friendly, useful way. Second, she gives helpful examples instead of miraculous case histories. Third, she makes difficult exercises palatable. For instance, I have a hard time sincerely declaring forgiveness for childhood abuse; it never feels honest. But Gloria Arenson, in this neat little book, gives the option of saying something like "My happiness and well-being are no longer dependent on my mother's approval," which is much easier for me to say than "I understand my mother did the best she could with what she knew, so I forgive her."
Little things like this make Five Simple Steps unique. If you're interested in energy tapping, buy it! I ordered a copy for my husband so we can each brightline our own favorite information.