If you want to discover Paris beyond the traditional tour book, cliched image, then this is the book for you. With 30 original walks, the author, a native Parisian, leads you t hrough the well known (and some of the lesser known) districts of the City of Light. Unlike traditional walking tour guides, which only offer the route (and nothing else), this book details the route while pointing out buildings and areas of historical interest.
Every route is clearly marked with a starting point, ending point and distance. A good feature of this guide is that the author points out the changes in the street names--goodness knows how many a walker has gotten lost because the Rue du Temple suddenly became something else.
The only shortcoming of this book (or any walking guide, for that) is how the walker has to constantly carry the book with them. A good suggestion is to write out the itinerary on a separate piece of paper, then check all the references when you get back to the hotel.
If you love walking and exploring, than this is the book for you. Just be sure to pack a good pair of walking shoes.