In Karen Thompson Walker's 2012 book The Age of Miracles, a young girl and her family awake one morning to discover that the rotation of the Earth has suddenly begun to slow, stretching the length of the 24-hour day and throwing the natural world into disarray. It's a big, speculative book, but at heart, it's a simple human drama, told through the eyes of an observant adolescent girl.
A former book editor at Simon & Schuster, Walker worked on the novel for three years, an hour each morning before work. Fun fact: The Age of Miracles was published on June 21, 2012 -- the longest day of the year. Since then, the bestselling, much-awarded book has been translated into 29 languages.