You Are Enough: Always Have Been….Always Will Be by David J. Walker; DeVorss, 2007
This small, easy-to-read book spectacularly illuminates the difference between the essence of who we are as lovable and worthy beings as distinct from what we do as performers, which is one of the key concepts for anxious performers to “get.” Very highly recommended. The first half of the book has a light spiritual (not religious) bent.
Present Perfect: A Mindfulness Approach to Letting Go of Perfectionism and the Need for Control by Pavel Somov; New Harbinger Publications, 2010.
This is an extraordinary book that contains compassionate, useful information about becoming free of the need for approval, as well as a vast array of insightful, reader-friendly explanations and helpful exercises regarding perfectionism.
The Fine Arts of Relaxation, Concentration, and Meditation: Ancient Skills for Modern Minds by Joel and Michelle Levey. Wisdom Publications, 2003.
This is the book I recommend to learn these skills because it is easy to read and includes a large number of exercises from a wide variety of perspectives. It is more comprehensive and user-friendly than most similar books.
Self-Compassion: Stop Beating Yourself Up and Leave Insecurity Behind by Kristin Neff. HarperCollins, 2011.
The best book on self-compassion I have seen. Based on research, it is nevertheless very readable. Highly recommended for those working to heal performance anxiety.
Working Out, Working Within:The Tao of Inner Fitness Through Sports and Exercise by Jerry Lynch and Chungliang Al Huang. Tarcher, 1998.
and
Thinking Body, Dancing Mind: Tao Sports for Extraordinary Performance in Athletics Business, and Life by Chungliang Al Huang and Jerry Lynch. Bantam, 1992.
Both have useful ideas and tools applicable to overcoming performance anxiety.