Charnock A Discourse of Delight In Prayer is a short work on prayer based on Psa 37:4.
Krummacher The Suffering Savior is a work about how Jesus had to suffer on the Cross in order to effect our salvation. He suffered for us so that we do not have to suffer.
Miller Things to Live for is a devotional work focusing on what is best for your Christian life.
Berkhof Systematic Theology has divisions on God, Man in relation to God, the person and work of Jesus Christ, the Work of Redemption, the Church, and Last Things (Eschatology).