I think this is one of the best books on the market for understanding people that are hard-of-hearing. I is easily read, and very complete. I think everyone who works along side a HOH person should read it. It explains what we hear and what we don't. I really liked the two charts that were included. It helped me to show my boss and co-workers just where my hearing level is and what sounds I don't hear. Anyone that lives or works with someone that is either hard-of-hearing or deaf should read this book. I would sure help us if others understood what they could do to make comucation easier for us.