In MATES, DATES AND SLEEPOVER SECRETS, TJ is having a difficult year, feeling very alone. When Lucy befriends her, things start to look up, but will Nesta and Izzie accept her? Will they let her into the world of sleepovers, secrets, laughter and advice? Can they help TJ be herself and discover her real potential? Then in MATES, DATES AND SOLE SURVIVORS, it's Lucy who's feeling lonely without a boyfriend. On a spa weekend with Izzie, Lucy meets someone who seems just right. But after a while, she starts to feel smothered. Can someone love you too much? Maybe the life of a singleton isn't so bad after all! Izzie is restless and eager to be treated like an adult. When she makes some changes in MATES, DATES AND MAD MISTAKES, the new Izzie comes with new problems, including an older but wild boyfriend, her mother's opposition to the 'new Izzie' and an unfortunate night involving cocktails. In the process, Izzie learns a great deal about herself and what it means to be grown up - but not before she's upset just about everyone along the way.