Take one part of the world's oldest spiritual system (shamanism), mix in one part of one of the world's most popular spiritual cultures (the Celts), and bring it up to date by blending in modern forms of shamanism. The result D. J. Conway's By Oak, Ash, & Thorn. This book is filled with information that can start you on a lifetime of study, practice, and spirituality. First, you'll learn about ancient and modern forms of shamanism. You'll discover...