The wikipedia article and presuppositionalism might be helpful since it compares and contrasts Clark's and Van Til's positions.

http://en.wikipedia.org/wiki/Presuppositionalism

Also there's an article on Gordon Clark: http://en.wikipedia.org/wiki/Gordon_Clark

and Van Til: http://en.wikipedia.org/wiki/Cornelius_Van_Til

What books of Clark have you found? I'd be happy to recommend some.

Recommend:

Religion, Reason, and Revelation

Christian Philosophy, The Works of Gordon Haddon Clark, Volume 4 (which includes RRR.)


Also his Lectures on Apologetics can be downloaded in mp3 format.

__________________
R. Anthony Coletti
Midway Presbyterian Church (PCA)
Jonesborough, TN
[i]et venite et arguite me dicit Dominus[/i]