Frame in a 2005 preface to the on-line edition writes:
This booklet was published by Pilgrim Press in 1972, in the midst of some theological warfare. Representatives of the Amsterdam Philosophy were then taking a militant stance against traditional Reformed theology, and the controversy created partisan battles on the campus of Westminster Seminary, where I was a very young professor. It also threatened to split churches, Christian schools, and other Christian organizations. As a member of a committee of the Ohio Presbytery of the Orthodox Presbyterian Church, I was asked to write a brief study of the movement, and the booklet resulted. Originally it was published together with another essay by Leonard Coppes, the Chairman of the Committee.
As I read the booklet today, I think my tone was far too shrill. The booklet also contains far too much smart-alecky stuff. I suppose I could have entirely rewritten it, but that would have made my 1972 efforts look better than they were. I prefer now to let readers judge me as I deserve, warts and all. I also think that the basic points of the pamphlet were never answered, though I received a lot of invective, and a lot of undocumented charges that I just didn’t know Dooyeweerd. On those issues also, I will let readers judge.
Andrew Basden has responded to Frame's original booklet here. Wether or not Andrew has answered the basic points of Frame's critique let the 'readers judge'.