I bought this book at the Alexander Graham Bell (AGB) museum in Baddeck, Nova Scotia, where Bell had his summer home, so my head was full of newly acquired AGB info and questions. This book helped fill out the picture you get by looking at info on AGB. It was written by a family friend who helped one of Mabel's daughters organize Mabel's letters. The author went on to do other research via family letters and Bell's notebooks. It gives a whole new perspective on Bell's life, his dedication to education of the deaf, and background to key events in the history of the telephone and the history of flight and the Curtiss airplane company. Mabel was a very intelligent woman, an articulate letter writer and thanks to the era she lived in, wrote many letters and paints a fascinating picture of her and Bell's life together. ( )