Complex sentence: In the stories, Horace disappears and fades away after Will saves his life on the boar hunt, while in the novel, Flanagan was able to make Morgarath the main villain and "rehabilitate" Horace and keep him as a main character.
Split into simpler sentences: In the stories, Horace disappears and fades away after Will saves his life on the boar hunt. However, in the novel, Flanagan was able to make Morgarath the main villain and "rehabilitate" Horace and keep him as a main character.