Ellie thinks she looks awful. Horrible. FAT. Her best friends are both drop-dead gorgeous and Ellie’s sick of being the ugly duckling. So she goes on a diet. And she even starts to exercise, much to her friends’ and her gym teacher’s amazement. Ellie’s hungry all the time, she works out every spare second, and she’s turned into a grouchy meanie. But if her friends don’t want to deal with the new and improved Ellie, that’s their problem. It’s better to be thin than happy. Isn’t it?
Feeling like she doesn't measure up to her "drop-dead gorgeous" friends, Ellie tries to take control of her weight, and ends up battling bulimia, in Girls Under Pressure by Jacqueline Wilson, the second book in her Girls trilogy.