What do you do when you have an incredibly annoying little sister? Write her letters telling her so, of course! Whininess, annoyingness, afraid of the darkness, refusal to eat lima beans, and pulling brother's hair. This is the criteria on which little sisters are graded. Inspired by the notes Alison McGhee's own kids would write each other, this heavily illustrated collection of letters and messages from an older brother to his little sister reveal the special love—or, at the very least, tolerance—siblings have for each other.