Depending on the personal interpretations of the authors?
By the way, most "Born Again"s will tell you that it is wrong to ADD ANYTHING to Scripture. That would include Bible Handbooks. Of course, that is just their personal interpretation, which I'm sure they find to be quite logical.
Utter hogwash. LOL. Do you REALLY believe what you just wrote? If so you are more naive than I thought.
Most "born agains" frequent bookstores, listen to music, buy teaching tapes. I've never met one Protestant who thinks a Bible Handbook is immoral.
What they do not "ADD" are written resources that carry equal weight to Scripture (of which there are none).