The Outlander book series, written by Diana Gabaldon, serves as the source material for the popular Starz show. The show faithfully adapts the books, with each season roughly corresponding to one novel. However, later seasons draw from multiple books with some changes for television. The upcoming season 8 will primarily adapt the ninth and final novel, "Go Tell the Bees That I Am Gone." Despite plans for more books in the series, season 8 will serve as the finale for the TV show.