Trail of Shadows Novella: Legend of the Five Rings - Rules of Play says:

In Trail of Shadows, a new Legend of the Five Rings novella by D.G. Laderoute, you’ll follow with Hida Sukune on a thrilling expedition into the unexpected horrors of the Shinomen Mori. Then, once you’ve finished the story, there’s still plenty of lore to dive into with a sixteen-page, full-color insert dedicated to the Crab Clan and packed with information on the Kami Hida, the Crab Clan’s wars against the Shadowlands, and their furtive allies, the nezumi. And if you’re a fan of Legend of the Five Rings: The Card Game, you’ll find an extra bonus, since Trail of Shadows comes with two alternate art cards (three copies each) for the game!