Nehwon is a fictional world created by author Fritz Leiber for his Fafhrd and the Gray Mouser stories. It is a rich and diverse setting filled with magic, adventure, and various cultures. The landscape includes cities, forests, and mountains, providing a backdrop for the exploits of its characters. The stories set in Nehwon often explore themes of friendship, heroism, and the complexities of life. The main characters, Fafhrd and the Gray Mouser, are skilled thieves and adventurers who navigate the challenges of their world, encountering a variety of creatures and magical beings along the way.