Savage Worlds has never been a game with a dedicated series of "monster manuals" meant for general use with the system; rather, bestiaries are largely setting-specific or exist as chapters in the various Savage Worlds genre companions. Grim Prairie Trails (whose name is surely an allusion to the classic horror western anthology film Grim Prairie Tales) is a hybrid book for Deadlands: Reloaded that presents a heapin' helping of monster stats within the context of short adventures that showcase how a GM might use the new adversaries found within its pages.
Included within the book are "generic" monsters and unique, named villains. General monsters include:
- Bloat: an animate, waterlogged corpse
- Clockwork Demoler: a robotic vermin-hunter
- Death Cloud: a sentient mist created by the fallout from experimental weapons
- Doomsower: blood roses that spread disease
- Fever Phantom: a specter of someone who succumbed to ghost rock fever
- Gluttonous Ogre: Asian-flavored ogre
- Hodag: a demon-possessed, undead ox
- Javeraha: a tusked beast
- Lyncher: the animate corpse of an innocent who met their end at the hands of mob justice
- Minikin: a murderous porcelain doll
- Raven Mocker: a vampiric being with avian talons
- Swarm Man: man-shaped thing formed from masses of beetles
- Terrormental: a corrupt elemental
- Weaver: a giant spider who can control people like puppets with its webs
Among the unique named villains are:
- Agatha Leeds: a black magician of the Whateley family
- Jebediah Nightlinger: the proprietor of a supernatural carnival
- Redcap Morris: an undead bounty hunter
- The Squatpump Gang: inbred hillbillies
- Wilton’s Head: a head in a jar with malicious powers
The book is rounded-out by a selection of useful "regular folk" and animal stats. Excepting the regular folk and generic critters, each of the above monsters is accompanied with a briefly-sketched adventure. This has become one of my favored ways to present monsters; by giving you both the stats for a new monster and an example of what you could do with those stats you get an incredible amount of utility from the book.
Overall, the variety of foes presented in Grim Prairie Trails is wide, ranging from undead, beasts, and even weirder tangents. The art is nice throughout, and having a varied selection of one-shot adventures with monsters the players aren't expecting is never a bad thing. This is a great little book for people running Deadlands: Reloaded, and the conversion work to bring it in-line with the current edition of Deadlands: The Weird West is minimal. The conversion work for other "weird west" games, such as Owl Hoot Trail or Haunted West, will be more arduous the further the system ranges from Savage Worlds' baseline assumptions, but it still might be worth picking up on the cheap as a source of ideas and adventure sketches.