Before the success of his Broadway musical, Hamilton, composer Lin-Manuel Miranda was inspiring thousands of Twitter users with original positive sayings, aphorisms, and poetry. In his The New York Times-bestselling book, Gmorning, Gnight!: Little Pep Talks for Me & You ($11), Miranda compiled his collection of affirmations — paired them with illustrations by acclaimed artist Jonny Sun — and created an assemblage of quick-read pick-me-ups.