That, and What Is Faith?, also by the great Machen.
I was just talking about this with some faculty at a seminary where I spoke Friday. Machen was astonishingly prescient. Apart from bibliography, he just about could be writing today, though it was actually more like 80 years ago.
Dan
This web site is very flashy, but it talks about an interesting fact about Machen that I never knew. He was a libertarian.
http://www.libertyhaven.com/theoreticalorphilosophicalissues/libertarianism/jgresham.shtml
Now I have to get dressed and head to church. :-)
I just watched the tribute to the Pentagon Victims. That was beautiful.