Days ago, Bungie released its third expansion, Rise of Iron, for its popular MMO shooter Destiny. A new short single-player campaign, multiplayer mode and six-person raid should keep players busy killing enemy aliens, and each other, for months. Undoubtedly, some of those gamers are parents, and while they pummel and gun down foes in-game, they might look wistfully at their kids sitting on the couch next to them. How can my progeny engage in this rich, bloody, grim universe with me, they'll ask? The answer, obviously, is a children's book.