Simply awful.

The previous reviews sum it up well. But to reiterate: Jemima is an ugly duckling (i.e. overweight and unfashionable) who diets (i.e. does not eat and over-excercises) her way to being a swan (i.e. slim and highlighted) at which point men become interested in her.

The author, apparently understanding that her book makes it seem that to be happy one should be anorexic, in a throw away line at the end says that Jemima decides that she likes being a curvy size 10 and finds balance in eating and exercise, but the damage is done.

If that's not bad enough, Jane Green uses the oddest writing convention. The book goes from third-person point of view to the strangest narrator asides to the reader. Really bizarre and distracting.