John Oman, The Problem of Faith and Freedom in the Last Two Centuries (New York: A. C. Armstrong and Son, 1906). Available on the Internet Archive.
Vision and Authority
John Oman, Vision and Authority (London: Hodder and Stoughton, 1902). Available on the Internet Archive.
Types of Modern Theology: Schleiermacher to Barth
Hugh Ross Mackintosh, Types of Modern Theology: Schleiermacher to Barth (New York: Charles Scribner’s Sons, 1937). Available on the Internet Archive.
The Christian Apprehension of God
Hugh Ross Mackintosh, The Christian Apprehension of God (London: Student Christian Movement, 1929). Available on the Internet Archive.
The Divine Initiative
Hugh Ross Mackintosh, The Divine Initiative (London: Student Christian Movement Press, 1921). Available on the Internet Archive.
The Originality of the Christian Message
Hugh Ross Mackintosh, The Originality of the Christian Message (New York: Charles Scribner’s Sons, 1920). Available on the Internet Archive [PDF; Epub; Kindle].
Immortality and the Future: The Christian Doctrine of Eternal Life
Hugh Ross Mackintosh, Immortality and the Future: The Christian Doctrine of Eternal Life (London: Hodder and Stoughton, 1915). Available on the Internet Archive.
The Doctrine of the Person of Jesus Christ
Hugh Ross Mackintosh, The Doctrine of the Person of Jesus Christ (New York: Charles Scribner’s Sons, 1912). Available on the Internet Archive.
The Problem of Suffering and Sin
Henry Churchill King, “The Problem of Suffering and Sin. III: Light from Christ,” The Biblical World 45, no. 3 (1915): 152–60. Available on the Internet Archive.
Foundations of Religious Belief
Henry Churchill King, “Foundations of Religious Belief,” in “The Foundations of Religious Belief. A Symposium,” by Calvin Goodspeed et al., The Biblical World 25, no. 4 (1905): 264–66. Available on the Internet Archive [PDF; Epub; Kindle].