The following books are recommended for studying historic postmillennialism, though they vary as to the scope, level and direction of the work.
The Victory of Christ's Kingdom: An Introduction to Postmillennialism by John J. Davis
The Millennium by Loraine Boettner
He Shall Have Dominion: A Postmillennial Eschatology by Ken Gentry
An Eschatology of Victory by J. Marcellus Kik
The Puritan Hope by Iain Murray
The History of Redemption by Jonathan Edwards
Messiah the Prince by William Symington
The Earth Filled With the Glory of the Lord by Samuel Miller
Commentary on the Book of Revelation by James Durham
Horae Apocalypticae by E.B. Elliott