Can't find this Book that was on GMA?

I was watching GMA today, and Robin Roberts was interviewing two british authors. The book was about fashion and women's body shapes, and how to dress for your body shape. I wanted to get the book from the library, but can't remember the names of the women or the title of the book. Talk about short term memory! I did look on the website, but that produced very little results. Any help is appreciated!