Welcome back to 'Fine Lines', the Friday feature in which we give a sentimental, sometimes-critical, far more wizened look at the children's and YA books we loved in our youth. This week, guest writer and novelist Laura Lippman takes on two books, 'Cheaper by the Dozen' and 'Belles on their Toes', and — Sweetheart, get her rewrite! — unearths a major scoop.