Depending on what one is looking for in the book, you may enjoy different sections. My favorite sections are absolutely the history (the Africa heritage, shaped by people living on the margin), tango as texts (poems as lyrics), milonga as the great BA conversion, tango as music and as dance.
One can see clearly that Argentina tango has been constantly developing its form. Thus an overview book like this that focuses on the artistic and historical part of it really helps to build up a perspective with time. And specially for a tango beginner, this book shows what you are really getting into.
On the outside it looks as steps become brush strokes, pose becomes picture. Blends of dance elements burst into being, open-ended yet structured. But the inside as I see it is about rediscovering self through emotional connections expressed in esthetics. It is nostalgic yet timeless.
Legendary Argentina tango dancers left us images and film that time cannot touch, but more importantly, it seems to be suggested in this book that every tango dancer can make 'forever begins tonight' as Rita Hayworth sang in movie 'Gilda'.
Life becomes a narrative when you dance 'La cumparsita' - Miguel Franco was probably right.