Decide which kind of tension you want
A threat that is visible from the outset creates suspense about escape or survival. A hidden threat asks you to reconsider who can be trusted. If solving the central question matters more than the danger itself, the Mystery collection may be a better starting point. Read the opening premise without assuming a thriller label guarantees twists of a particular kind.
How is a thriller different from suspense?
Thrillers commonly organize the story around danger and urgent decisions. Suspense describes the experience of waiting for an uncertain outcome. The labels can overlap, and this catalog preserves that overlap instead of forcing each title into only one category.