I recently wrote my undergraduate Art History thesis on Guimard's Paris Metro entrances and if not for this book, I would have barely been able to write the paper. This is by far the best book on Guimard that exists (especially in English). Vigne writes about details of Guimard's life that no other book even hinted at. He read personal letters of Guimard's and definitely did his research in order to give the reader the most in depth biography of Guimard I found. Also, Vigne used Ferre's photos to beautifully illustrate Guimard's works. I feel so lucky to have found this book not only for the sake of my thesis, but for my interest in Guimard as a whole.