Dan Simmons is a fan of the novella. I am, too. The novella is an intriguing literary form in that it straddles the distance between a short story and a full novel. This tenuous length requires an author to commit to the character depth and detail of a longer form and scrupulously apply an unapologetic editorial edge to the plot. This collection of five novellas includes “Orphans of the Helix”—a novella associated with the Hyperion Cantos—and the rare “Looking for Kelly Dahl.”