Recommended Reading for Unity Basics

The Unity Movement: Its Evolution and Spiritual Teaching by Neal Vahle
The Story of Unity by James Dillet Freeman

Unity: A Quest for Truth by Eric Butterworth

Alternatives: New Approaches to Traditional Christian Beliefs by William L. Fischer
The Five Principles: A Guide to Practical Spirituality by Ellen Debenport
The Simple Truth: Making Sense of God, Life & Other Stuff  (book) or Kindle Version by Mary-Alice and Richard Jafolla

Prayer
Teach Us to Pray  by Cora and Charles Fillmore
The Universe Is Calling by Eric Butterworth

Metaphysics
Lessons in Truth by H. Emilie Cady
The Twelve Powers by Charles Fillmore
Your God-Given Potential: Unfolding the Twelve Spiritual Powers by Harriet Wilkinson Hausmann
Heart-Centered Metaphysics (book) or Kindle Version by Paul Hasselbeck

Bible
Be Ye Transformed  by Elizabeth Sand Turner
Your Hope of Glory by Elizabeth Sand Turner
Let There Be Light by Elizabeth Sand Turner
Reading the Bible Again For the First Time by Marcus Borg

Prosperity
Spiritual Economics by Eric Butterworth
Prosperity by Charles Fillmore

Personal Growth and Inspiration
The Quest: A Journey of Spiritual Rediscovery by Richard and Mary Alice Jafolla
Discover the Power Within You by Eric Butterworth
How to Let God Help You (book) or Kindle Version by Myrtle Fillmore

Health and Healing
The Quest for Wholeness by Robert Brumet
Myrtle Fillmore's Healing Letters compiled by Frances Foulks