Does size matter? For fans of Sophie Kinsella, a funny, romantic novel about losing weight... and putting it back on again

It's fair to say that Charlie Glass is carrying a little excess baggage - emotionally and physically.

For years her excess weight means she's been the butt of her skinny stepmother and half sisters' jokes, and she's had enough.

So, after a few weeks at a boot camp, Charlie returns slim, gorgeous and ready to run the shoe firm that, to her sisters' annoyance, she has inherited from their beloved father. And when she bags a glamorous boyfriend, her transformation is complete.

Life is almost perfect (skinny stepmother aside), but her best friend Lucy seems resentful, Ferdy, the man she has secretly adored for years, apparently preferred her the way she was, and the constant battle to stay thin and beautiful is torture.

Would it really matter if the weight crept back on? There's only one way to find out.