Angelology is my own writings on Angels taken from my own Bible study and research.
Dehaan Angels and Demons: Their Nature, Origin, Ministry, and Classification is a very short book of 4 chapters on different points on angels and demons.
Anon Basic Christian Doctrine is a 50 Chapter doctrines book that is anonymous.
In this work by R.A. Torrey, What the Bible teaches, Torrey examines in six books about God, Jesus Christ, the Holy Spirit, Man, Angels and the Devil.
Dabney was a Baptist, and this work is his Systematic Theology. Dabney was also Calvinistic.
Bragg Angelology Systematic Theology by E.C. Bragg (Trinity College) is a set of classes notes apparently on angels. He is brief but has good material.
CIM: Angelology is a 63 topic module with a basic breakdown of topics as Registry of Internet Material on Angels, Angelology, Satan, and Demons. This module indexes other of our modules at twmodules.com.