Below are various readings which have shaped my beliefs over time. I do not agree with all perspectives and views within the books but are useful and helpful either way. Books may be added over time.

God and the Trinity

The Trinity: An Introduction (Short Studies in Systematic Theology) by Scott Swain

Two Views on the Doctrine of the Trinity (Counterpoints: Bible and Theology)

One God, Three Persons, Four Views: A Biblical, Theological, and Philosophical Dialogue on the Doctrine of the Trinity (Studies in the Doctrine of God) by C. A. McIntosh 

Human Free-Will and God's Sovereignty

Perspectives on the Doctrine of God: Four Views by Bruce Ware

The God Who Risks: A Theology of Divine Providence by John Sanders

God and the Problem of Evil: Five Views by Chad Meister and James K. Dew Jr.

The Openness of God: A Biblical Challenge to the Traditional Understanding of God

Christ and His Reconciliation

The Meaning of Jesus: Two Visions (Plus) by Marcus J. Borg and N.T. Wright

The Universal Christ by Richard Rohr

What Jesus Didn't Know: A Defense of Kenotic Christology by James Agnew

The Nonviolent Atonement, Second Edition by J. Denny Weaving 

Evolution and Creation

Beyond the Evolution Vs. Creation Debate by Denis O. Lamoureux

Old Earth or Evolutionary Creation? By Kenneth Keathley, J. B. Stump and Joe Aguirre

Christian Living

- Searching for Sunday by Rachael Held Evans

Other Religions

Four Views on Salvation in a Pluralistic World (Counterpoints: Bible and Theology)

Heaven and Hell

- Varieties of Christian Universalism by David W. Congdon

- Heaven, Hell and Purgatory by Jerry L. Walls

Miscellaneous 

- Francis of Assisi in His Own Words: The Essential Writings

- Across the Spectrum by Gregory A. Boyd and Paul Rhodes Eddy