Thomas Aquinas in 50 Pages: A Layman’s Quick Guide to Thomism  by Dr Taylor R. Marshall is pretty much what the title states it is. It is a text about the basics of how St Thomas Aquinas thought and what he taught. The text is organized into 12 sections, excluding the introductory note and endnotes (references). The last section before the endnotes is a helpful glossary. The main text is over fifty pages if one includes this but it is still a very short book. It is an excelle

Philosophy 101 by Socrates: An Introduction to Philosophy via Plato’s Apology by Peter Kreeft, first published in 2002, is a concise text...

This 12-part lecture series provides a good overview of philosophy with a Christian perspective.