If you are looking for the original text or study guides to "put together" your own understanding of his methods, several digital archives and seminars offer these resources: Resource Type Source / Platform Description Internet Archive A digitized 1973 edition containing the original maxims. Historical Maxims Scribd - Vocal Wisdom
Lamperti famously wrote: This subtle shift in semantics solves the greatest hurdle for most singers. The instinct is to grip the ribs or the stomach, creating high pressure. Lamperti flips this, advocating for an elastic, expansive pressure where the body acts as a shock absorber, not a compressor.
Read an overview of the book's history and its connection to the 19th-century tradition at ResearchGate