Centering Prayer Reading List
Thomas Keating, Open Mind, Open Heart. (New York: Continuum, 2006)
A good introduction to centering prayer, this classic book has recently been revised in honor of its 20th anniversary.
Cynthia Bourgeault, Centering Prayer and Inner Awakening. (Cambridge, MA: Cowley, 2004)
Cynthia Bourgeault has worked closely with Thomas Keating and this book is an excellent guide for those who would like to go deeper into centering prayer. Includes a good chapter on the welcoming prayer.
Contemplative Outreach website
http://www.centeringprayer.com/
Contemplative Outreach is a good resource for more information on centering prayer, centering prayer weekly groups, and centering prayer retreats.
Suggestions for Home Practice | The Welcoming Prayer | Mindful Living
Centering Prayer Reading List | Setting Up a Centering Prayer Group
Weekly Centering Prayer Group