Crawlspace is a collection of stories by Dave Freer and Eric Flint, who have collaborated on many novels together. This volume includes two stories from their popular Rats, Bats & Vats series. “The Genie Out of the Vat” is the novella that begins the entire cycle. “Crawlspace” is set about a century later and depicts the further evolution of the peculiar society of humans and uplifted rats and bats. Also included in the volume is a story from the massive Heirs of Alexandria series that they’ve been writing with Mercedes Lackey for more than two decades.