I just published a book called "Manoj the Yogi on Kriya Yoga"
This book is a synthesis of all the knowledge and experience I've acquired over the last 19 years, distilled down to its essential essence. The book has been written with both the beginner and expert in mind. The book is short, simple and to the point. It contains just 7 lessons, where the first is suitable for all and the last for only the most advanced yogis, everything essential is covered. I've taken inspiration from the Hatha Yoga Pradipika, as well as the work of Swami Satyananda Saraswati and Paramahansa Yogananda in creating this condensed yet extremely effective course on Kriya Yoga.
Love always.