Books on Lucid Dreaming (the first two recommended by forum user andrewl)
Exploring the World of Lucid Dreaming by Stephen LaBerge
“LaBerge gives interesting examples of how professionals in different fields have used lucid dreaming to benefit job performance, good examples being a programmer who used lucid dreaming to work out bugs in thier code, and a surgeon who used lucid dreaming to practice complex surgeries.” – from andrewl
Stephen LaBerge is no touchie-feelie type, but a serious dream research scientist: his 1980 Ph.D. dissertation at Stanford University is titled “”Lucid Dreaming: An Exploratory Study of Consciousness during Sleep,” and he is the co-author of a number of scientific studies on the various aspects of this subject.
Lucid Dreaming: Gateway to the Inner Self by Robert Waggoner
“Waggoner focuses more on the metaphysical and philosophical/spiritual implications of lucid dreaming, as well as the different elements at play in lucid dreams, including the general development of the skill over time, a roadmap of sorts of how the skill generally develops for most people, from beginning to expert. His discussions of what he calls the ‘conscious unconscious’ is also illuminating.” – andrewl
And I will add the following title:
Lucid Dreaming: New Perspectives on Consciousness in Sleep edited by Ryan Hurd, M.A. and Kelly Bulkeley, Ph.D.
This fairly expensive two volume set is an in-depth, multidisciplinary exploration of lucid dreaming from the perspective of science, psychology, and education in one volume, and religious traditions, creativity, and culture in the other.