In Such a Pretty Fat, Jen Lancaster learned how to come to terms with her body. In My Fair Lazy, she expanded her mind. Now the New York Times bestselling author gives herselfand her generationa kick in the X, by facing her greatest challenge to date: acting her age.

Jen is finally ready to put away childish things (except her Barbie Styling Head, of course) and embrace the investment-making, mortgage-carrying, life-insurance-having adult shes become. From getting a mammogram to volunteering at a halfway house, she tackles the grown-up activities shes resisted for years, and with each rite of passage she completes, shell uncover a valuableif probably humiliatinglife lesson that will ease her path to full-fledged, if reluctant, adulthood.