Fortner Life After Pentecost is an 85 chapter commentary on Acts by Don Fortner (Baptist, Calvinist-Reformed). These are shorter doctrinal explanations and observations on the text. They are excellent.
In Boettner Post Millennialism this 15 chapter work, Boettner (Presbyterian) examines the doctrine of Postmillennialism. He begins with representative theologians, an introduction, a statement of the doctrine and a chapter on “Inadequate terminology”. He then presents us with another 10 chapters on issues is and around the doctrine, like the world is growing better, the millennium not a perfect or sinless state, the 1000 years as a symbolical figure, principles of interpretation, etc.
In Boettner Unconditional Election this 6 chapter work, Boettner (Reformed, Calvinist) examines election. This is the reformed-Calvinist view of election, that is, that it is unconditional. He first states the doctrine, and then reasons with proofs from Scripture and reason, and then examines faith and good works are the fruits and proof of election, not the basis of election, then he examines reprobation. In the final chapter he examines infralapsarianism and supralapsarianism.
In this 5 chapter work on Salvation, Boettner examines the grace aspect of salvation looking at man not deserving of salvation, God’s pleasure to give or withhold, salvation isn’t earned, etc.