Super-Learning - Sheila Ostrander, et al
Super-Learning, by Nancy Ostrander, et al, was originally published in 1979. This book introduced the concepts of a theta-rich learning environment, structured breathing and delivery. A well researched contribution that leads the way in many areas. Revised and updated versions have also been published.
The specific delivery techniques, upon which I’ve built several programs, work reasonably well, but are very specific in the types of information that fit the pattern. However, the general background on receptiveness is excellent and applies much more broadly.