When you say linear, you mean it's a kinetic novel, or it will have routes and choices but the main story doesn't chance besides from your routes decisions?
The latter! Some decisions/choices, but it won’t change the main story! Routes will change things, but in the sense that each route has its own sub-story. The world’s main story will feel a little different depending on the route, but the main idea/issue won’t change. Hope that helps clarify! Thanks for the comment!!