From publisher blurb: The Grassy Sea is a a blackpowder expansion & hex crawl for sword-and-whiskers role-playing. The Grassy Sea swells with wind, waxing and waning with the seasons. But in summertime when the grass grows green and long, pirates lurk in the fields, ready to plunder. The Grassy Sea includes a 19-point hex map and full adventure site for The Hollow Tree Gang, as well as the blackpowder rules, weapons, and items. An 8 page supplement ready for your mice to explore.