This anthology solves many unanswered questions left over from the show. For instance: What event inspired Dr. Horrible to become the world's greatest criminal mastermind? Why is Penny, the beautiful girl from the Laundromat, still single? How can you, the reader, be like blustering do-gooder Captain Hammer? And why is Horrible's sidekick, Moist, so . . . um . . . well, you'll find out!