Assumptions that Affect our Lives by Christian Overman. Takes the reader back to the roots of the modern conflict between Christianity and secular humanism through a comparison of ancient Greek and Hebrew culture. Helps you learn to deal with the challenges of living in a predominately Greek-based culture today.

Philosophy

Logic

Apologetics

Socrates to Sartre and Beyond: A History of Philosophy by Samuel Enoch Stumpf. A comprehensive, historically organized introduction to Western philosophy. Perhaps the best single-volume on the subject.

A History of Western Philosophy: by W. T. Jones and Robert J. Fogelin. This is part of a five volume set, each of which is excellent.  It is more thorough than Stumpf’s book, but more expensive, unless you can find the series used.

History of Philosophy by Frederick Copleston. Conceived originally as a presentation of  the development of philosophy for Catholic seminary students, Copleston's nine-volume set has journeyed far beyond the modest purpose of its author to  universal acclaim as the best history of  philosophy in English.

Philosophical Foundations for a Christian Worldview by J. P. Moreland and William Lane Craig. In Philosophical Foundations for a Christian Worldview J.P. Moreland and William Lane Craig offer a comprehensive introduction to philosophy from a Christian perspective.

Introduction to Philosophy by Norm Geisler and Paul Feinberg. Well-organized presentations of most of the significant philosophical positions make this book an excellent reference tool. 

Life’s Ultimate Questions by Ronald Nash. By synthesizing three distinct approaches—topical, historical, and worldview/conceptual systems—it affords students a breadth and depth of perspective previously unavailable in standard introductory texts.

A Concise Introduction to Logic by Patrick Hurley. Unsurpassed for its clarity, conciseness, and comprehensiveness, Hurley's market-leading book has established itself as the standard for introductory logic classes. 

Socratic Logic by Peter Kreeft. This is the only complete system of classical Aristotelian logic in print (though Hurley’s book covers traditional logic in good detail). Dr. Kreeft is a Catholic apologist heavily indebted to St Thomas Aquinas.

An Introduction to Christian Apologetics by Edward J. Carnell. Deals with 14 major subject including; The Problem of Truth, What Is Faith?, The Problem of Evil, etc. Carnell's insights into the classical problems of theology and philosophy remain incisive and refreshing.

Reasonable Faith: Christian Truth and Apologetics by William Lane Craig. The author gives careful attention to crucial questions and concerns, including: How Do I Know Christianity Is True?, The Absurdity of Life Without God, The Existence of God, The Problem of Miracles, and The Resurrection of Jesus.

Answering Jewish Objections to Jesus, Vol. 1: General and Historical Objections by Dr. Michael Brown. Offers well-researched, thoughtful, biblical responses to difficult questions that arise when Christians share Yeshua (Jesus) with Jews. Note there are 4 volumes to Dr. Brown’s series.

What the Rabbis Know About Messiah by Rachmiel Frydland. Moshe Alshekh, a 16th-century rabbi, summed it up best when he said, "Our rabbis with one voice, accept and affirm the opinion that the prophet (Isaiah 53) is speaking of King Messiah."

The Messiah Texts by Raphael Patai. The most comprehensive compilation of Jewish texts about the Messiah in English. Chapters cover such things as pre-existent names of the Messiah, prophecies, apocalyptic writings, birth of the Messiah, stages of the Great Redemption, Last Judgement, Resurrection, dreams and visions of the future world, etc.

Provocations: Spiritual Writings of Kierkegaard by Soren Kierkegaard (Author), Charles E. Moore (Editor). Perhaps the most accessible presentation of the wonderful thinking of Soren Kierkegaard available in English. Highly recommended!

Our Father Abraham by Dr. Marvin Wilson is a foundational writing that will help you better understand the impetus behind the Jewish Roots movement and why so many Bible-believing Christians are turning to the Jewish faith for nourishment and strength. For those new to the Hebraic mindset, this is a great place to start your learning!