This is a book written in considerable detail about Frequency Specific Microcurrent (FSM) therapy. I purchased it at a bookstore the other day at the list price and have only read one section that I wanted to learn, so it is in very good condition. - Title: Resonance Effect - Author: Carolyn McMakin - Price: 2970 yen - ISBN: 978-4-86451-423-1 - Language: Japanese