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.
Life and Times takes Jesus the Messiah, and examines the New Testament teaching in light of Jewish history and culture
Dr. Luginbill’s work, Angelology, the Study of Angels, is a single chapter work on Angels. Although brief, it is quite well documented on the specifics of the doctrine of angels.
Angelology is my own writings on Angels taken from my own Bible study and research.