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"Just the Right Bullets" by Mercedes Lackey:

Space travel is tough. No air, cosmic radiation, absolute lack of other life-sustaining essentials.

What better way to deal with space travel than to man ships with creatures that regenerate or don't need air, or are immune to various maladies?

In a future world where zombies, vampires and werewolves co-exist with 'normal' humans on Earth, these ships are staffed by a motley crew of various types of undead or near-dead creatures.

Of course no one really knows what happens when zombies and vampires are squeezed together in the close confines of a spaceship.

Don't you love surprises?

With a prequel novelette "Bad Moon Rising" by Cody Martin.

Say hello to Humph the Boggart, the principled, down-on-his-luck private detective, Skinny Jim the zombie, and Fred the werewolf, in this film noir style space opera.

Humans aren't alone anymore--in fact, they share a planet with undead and near-dead beings, living in... semi-harmony, depending on who you ask!

This is the world of Reboots--where zombies, vampires, and werewolves live side-by-side with humans, taking whatever jobs they can to coexist peacefully. So, what better job to give almost-dead or dead beings, than one that consists of no air, cosmic radiation, and a lack of life-sustaining essentials?

In comes a cast of interesting, unique, and downright paranormal creatures as they travel through space.

Follow Skinny Jim, a zombie who conceals his ability to speak to avoid being exterminated after an ill-fated war launched by a zombie emperor, leading to an alliance between Norms, the Fangs, and the Furs. And then there's Humph the Boggart, an ethereal parahuman private investigator who navigates interspecies relationships in claustrophobic extraterrestrial environments with his friends, including Fred the werewolf.

And what happens when you put them all together in a confined space?