Original Reiki-Handbook,
by Mikao Usui, Christine M. Grimm (Translator), Frank Arjava Petter

Lotus Press; ISBN: 0914955578

$11.96 at Amazon

The Power of Reiki : An Ancient Hands-On Healing Technique
by Tanmaya Honervogt

Owl Books; ISBN: 0805055592

$13.56 at Amazon

Reiki For A New Millennum
by William Lee Rand

Vision Publications; ISBN: 1886785023

$14.95 at Amazon