Cox W.E. The Bible without Comment a single chapter work is an excellent criticism of the first version of the Scofield Reference Bible, being a leveling of adding opinions and comments to actual text of the Bible, making a semi-canonical type of presentation. Indeed many people today consider Scofield’s Notes almost as inspired as the original Scriptures. This is a definite read for every Christian.
Charnock A Discourse of Delight In Prayer is a short work on prayer based on Psa 37:4.
This is a single chapter article by Cable (Probe.org) on how to witness to people of the Islamic faith.