Anon Basic Christian Doctrine is a 50 Chapter doctrines book that is anonymous.
Miley Systematic Theology covers an introduction to Theology, Theism, Theology, Anthropology, Christology, Soteriology, Eschatology, and appendices on Inspiration, Angels, and the Arminian Treatment of Original Sin.
Mark Cambron’s Bible Doctrines work is an extensive doctrines book used by Florida Bible College. Cambron’s work covers Angels, Man, Holy Spirit, Christ, Salvation, Sin, Prayer, and the Doctrine of God.
The single most defining characteristic of who man is, is what the Bible calls the Image of God, or, as theologians refer to it, the Imago Dei.