In Volume 1 of this book series, spontaneous memories of young children about their past lives were described as the most convincing evidence for reincarnation. In the present volumes 2a and 2b, the contribution of hypnotic regressions of adults into their presumably past lives is discussed in answering the question of reincarnation. A total of 177 books were analyzed, and as a result, you can expect in Volume 2a: - 12 of the best-documented cases from various authors presented in detail - a total of 20 successfully verified cases and 37 brief examples - Prof. Helen Wambach's study based on a large number of regressed individuals - an assessment of the significance of speaking unlearned languages (xenoglossy) - answers to 51 frequently asked questions - "techniques" of regression and their potential dangers - the historical development of regression.