Yes, there is a sequel to the book Hatchet by Gary Paulsen. The sequel is titled The River, and it continues the story of Brian Robeson, the protagonist from the original novel.
In The River, Brian is called upon by the government to recreate his survival experience for a group of people. He embarks on a new journey that tests his survival skills and emotional resilience once again. The book explores themes of survival, the impact of trauma, and the development of Brian as a character after his harrowing experience in the wilderness.
Gary Paulsen has also written additional sequels, including Brian’s Winter, Brian’s Return, and Brian’s Hunt, which further expand on Brian’s adventures and growth.