It's GREAT! I am enjoying my copy that I obtained from the classifeds on this website, about two weeks ago..Fully indexed (with both aeroplanes AND aviators), clear photos, and very short, specific information without long text to wade through, when researching. Is full of specific names, dates & places of first flights, experiments, historic and significant flights and evolution of many very obscure aaeroplanes. Was having difficulty researching names and significant flights of 33 pre-WWI aviators signed in an autograph book I have of mostly 1910-1913 Hendon fliers and flights. Found HEAPS of info fast & easy, in this book.