The Miracle Brigade — Scott Reeves

In this 26,000-word novella, after attending a seminar led by a famous, charismatic motivational speaker, four dysfunctional misfits are unexpectedly granted superpowers that are fueled by their individual dysfunctions.

There's the nerd whose extreme shyness allows him to become invisible. There's the princess, whose fear of old age allows her to time travel into the past. There's the stressed office worker, whose sense of not having enough time allows him to freeze time. Finally, there's the delivery guy, whose claustrophobia allows him to walk through walls.

Their first mission: find the President of the United States, who has suddenly gone missing.