Reiki is best learned in person, but good books can deepen your understanding and give useful context. A few widely respected titles to begin with:
Where to start
A broad, well-researched overview of Reiki’s history, practice, and many styles — a common first reference.
A practical, widely used manual covering the Western system across its levels.
On history and roots
A closer look at the Japanese roots and spirit of the practice.
An early and influential account that helped reintroduce Reiki’s Japanese origins to Western readers.
On practice
A clear, structured guide through the three degrees, useful alongside a course.
Reflections drawn from Hawayo Takata, giving a sense of the lineage’s voice.
A word of guidance
Read widely and keep a light, discerning touch. Reiki has no single authority, and books differ in emphasis and reliability — some blend history with later additions. Treat reading as a companion to practice and to a good teacher, rather than a replacement for either.
Titles and editions vary, and this is a starting shelf rather than a definitive list. Your own teacher may well suggest others worth your time.