I continue to believe that a manual covering hearing issues in general--i.e., things like why you need a telecoil, the accessories that may help you, why each brand has its own line of accessories--would be helpful, especially to those buying their first aid. Yes, technology changes every time we blink, but some of the basic info remains with us for several years. If anyone is interested, contact me directly as I have all the knowledge to write, edit, illustrate, publish and distribute books.