Air

When the dead rise in Houston, Dave and Chris Thompson find themselves stranded on the top floor of the Liberty Medical Center, with nowhere to run and no help in sight. With Dave's broken leg making movement impossible and the disintegration of civilization accelerating around them, they have to act fast, or be consumed by the seething horde below.
NOTE: Air is a 10,000 word (about thirty-six pages in paperback) story chronicling the trials and tribulations of a new character in the Elements of the Undead universe.