Kriya Yoga: Synthesis of a Personal Experience is a rare gem of experience-based, practical spiritual knowledge and instruction. It is not often one finds such a direct, down-to-earth guide that is free of intellectual, philosophical language and gets right to the point. The author has had a lifetime of practice with several schools of Kriya Yoga, and he has passionately devoured a wide range of yoga and esoteric texts. He presents a lot of previously secret knowledge and compares the different tradtitions in an honest, frank way. The best part is that he himself has taken the practices deep enough to experience their intended effects and can relate exactly what is achieved by them. While the results can differ to some degree for different practitioners, who will each experience different effects and have differing preferences, it is still an excellent outline of what is possible and what may be the most fruitful combination of techniques.
Not only does the author cover different Kriya Yoga schools, but he also talks about other spiritual paths including Sufi, Radhasoami, Japa Mantra and Christian mystical practices such as Hesychasm and the Continuous Prayer. He discusses how these all have similarities to aspects of Kriya Yoga and can even be combined with Kriya practices.
There is so much material in the book that it can be overwhelming. It would take many years or indeed a lifetime of devoted daily sadhana to get through it all depending on where one is starting from. However, he conveniently gives recommendations for what he thinks are the best practices for beginners and those on different stages of the path. I think the key is not to be tempted to take on too much too soon, but diligently practice the foundational practices for a long time before continuing. It is helpful to read the whole book, highlight and bookmark parts or take notes and then go back to sections and read again.
I rarely write reviews, but this is such a treasure house of knowledge that I think any serious student of Kriya Yoga should read. It is updated yearly and is available as a free PDF - just search for it on "Google"(I use the Ecosia search engine instead as they donate to forest restoration projects :-)). Ennio also has demonstration videos on his website. Note that he is Italian and it is translated from the Italian version, so you will find a number of grammatical and spelling errors, but that doesn't bother me at all since the content is so valuable.
I am so grateful to Ennio Nimis for providing this very personal and practical summary of previously secret or hard-to-find knowledge and experience distilled into one book.
Up there as one of the most fascinating and revealing books - and greatest harbors of hidden knowledge and reality - I have ever read and encountered. There is something - energy is a concept used to describe it - which can be manipulated to go through the area the spine inhabits, and into the head area, and induce all sorts of automatic "kriya" phenomena, automatic physical movements such as spine straightening, rythmic movements, eyes centering upwards and in, nevermind the subjective experiences that can then later come. True seekers of discovery, spiritually or merely biological frontiers, if skeptical, would do well to read this and be terrified and dumbfounded at what is possible, by taking action (where the term "kriya" generically derives from) and testing out the practices, the main one being "spinal breathing" slow methodical breaths, focusing like a spotlight smoothly up and down the spine as you inhale and exhale, which is essentially kriya spinal pranayama. Furthermore, another important one recommended in the book aiding that is "Japa Yoga", or simply mantra meditation, seated and walking. This improves your ability to have presence of mind, internal quietude, replacing thoughts with internal sounds, in order to have less distractions and more subtle perception thus ability to focus on the kriya pranayama.