Thriller is a genre of fiction with numerous,
often overlapping, subgenres, including crime, horror, and detective
fiction. Thrillers are characterized and defined by the moods they
elicit, giving their audiences heightened feelings of suspense,
excitement, surprise, anticipation and anxiety.
A romance novel or romantic novel is a genre
fiction novel that primary focuses on the relationship and romantic love
between two people, typically with an emotionally satisfying and
optimistic ending.