It's called Dot Complicated, get it? Randi Zuckerberg, the social media executive and entrepreneur who left her CEO brother Mark's Facebook in 2011, has signed a two-book deal with HarperCollins. Dot Complicated, the same name as her newsletter, will be a memoir that includes her thoughts on the digital age, covering her years as Facebook's marketing director to 2011, when she became a mother. The second book will be a children's story. We hope she can dish a little on Mark as well.