Gary North was nearly impossible to track down. He did not return multiple e-mails, and when finally reached by phone, he refused to talk and hung up.
But if you know where to look, he is everywhere.
He is a trained historian with a PhD from University of California, Riverside and his book on the political theology of the American Founding I think well understands its implicit unitarianism and how such is incompatible with Christian Reconstructionist political theology.
Update: North explains why he hung up. I enjoy reading North's jab at the print industry. I do follow North's prognostications on the future of technology. For an old fogy he's arguably a cyberpunk. Though I take what he (and just about what everyone) says with a grain of salt. His predictions on Y2K were embarrassingly wrong. Though, the creative destruction of Moore's Law is something to be a acutely aware of, if you are concerned about how you (and/or your posterity) will live in the near future. We won't get "Mr. Fusion"-flying cars or that free energy source until the next breakthrough (who knows when that will be). But information technology is itself a breakthrough that is currently riding an exponential wave that will terminate in something fascinating and arguably, predictable in a way that "Mr. Fusion" is not.