From publisher blurb:
Kethos is a world of intrigue, exploration, conflict, and adventure. It is a world of multiple civilizations dominated by Humans, shattered and remade multiple times, where gunpowder and magic stand together. Empires clash, while horrors long-forgotten rise in dark places. Heroes can help create a new world, explore the ruins of the bygone past, and face down dangers for glory, riches, and their gods. The setting can be used with any game system, but this particular book covers the rules necessary to create characters and play a campaign using the excellent Open Gaming License/5e D&D game system. It includes character generation, magic systems, setting rules, magic, equipment, and an extensive bestiary. This book requires some version of the D&D 5e/OGL game system rules to use. This 400-page guidebook for OGL/5e - Kethos includes:
A detailed, realistic, and most of all playable setting and history for an entire world.
A detailed city and kingdom to start your campaigns in.
Detailed descriptions and statistics of dozens of nations in diverse regions of the world, including the fractious and divided Kehler Lands, the vast and ancient Perashdan Empire, and the bizarre and distant Five Kingdoms!
Immediately useful adventure hooks, significant locations, and interesting non-player characters for every location.
Numerous useful maps for all levels of the setting.
More than a dozen playable races and sub-races.
Over two dozen new Edges, Hindrances, and Skills.
Several new magic systems, including Alchemy, Enchantment of Magic Items, and Ritual Magic.
Over a dozen new Powers and Magic Items.
Design systems and rules for both seafaring and flying vessels.
Extensive new equipment lists, including weapons, armor, and magic items.
Illustrated bestiary with dozens of new creatures.
Three introductory adventures, including dungeons, urban intrigue, and wilderness exploration.