Here's why:
* Gothic: The novel features a haunted atmosphere, a mysterious and imposing setting (Manderley), and a sense of dread and suspense. The character of Rebecca herself, though deceased, looms over the narrative with a ghostly presence.
* Suspense: The plot unfolds with a sense of mystery and intrigue, keeping the reader on edge. The narrator's growing paranoia and the constant fear of the unknown contribute to the suspense.
* Romance: The novel explores the complicated relationship between the unnamed narrator and Maxim de Winter, their marriage, and the lingering presence of Rebecca's memory.
* Psychological Thriller: The novel delves into the narrator's psychological state, her insecurities, and the impact of her past trauma. The themes of obsession, guilt, and the nature of identity are explored in a chilling and captivating way.
While "Rebecca" can be categorized into multiple genres, it is primarily known for its Gothic suspense elements, making it a timeless and influential work of literature.