From the book blurb:
Part 1 of this book traces the reception of Baader’s ideas by Daniël Chantepie de la Saussaye and J.H. Gunning Jr., who then introduced Baader’s Christian theosophy ideas to Dutch Reformed theology. Chantepie de la Saussaye and Gunning transmitted these ideas to Kuyper, who acknowledges their influence. Kuyper refers to Baader’s writings with approval, and incorporates many of his ideas.
Part 2 is a history of the development of Dooyeweerd’s Christian philosophy, and of the very different philosophy of his brother-in-law Dirk Vollenhoven. Whereas Dooyeweerd chose to incorporate the ideas of Christian theosophy, Vollenhoven did not. They disagreed with respect to almost every idea in their philosophies.
Part 3 is a detailed examination of Dooyeweerd’s Christian philosophy. Although Dooyeweerd was not at all forthcoming about his sources, it is clear that there is a deep historical connection of his philosophy to Baader’s Christian theosophy, as well as to other mystical and non-Reformed sources. This insight allows us to understand many previously obscure parts of his philosophy and to correct previous misinterpretations of his work. It also opens the way for ecumenical and inter-religious dialogue.
UPDATE: Friesen’s book is now available on Amazon.