Here is the deal. I am trying to find everything I can that was published in the 1970s on or at least touching on the topic of the regulative principle of worship. Any one who can come up with something I already do not have will get a free book from Naphtali Press or a free comprehensive psalter (your choice of what's in print). I want American titles; you can list British but while you get kudos you don't get a book. And this can't be just anyone writing on worship, it has to be on the RPW (for or against). Byt the 1970s most all should be using that term for the principle. Here is what I have: This offer is open until I close it. I will limit this to ten people getting free books; I cannot imagine there are that many more titles out there but I need to cover myself someway. So start posting those titles!