What kind of genre might the 'it comes in threes novel' belong to?

It could be a mystery genre. Since it involves 'the night child', there might be a lot of unknown elements and secrets to uncover.

It could be a mystery genre. Given the mention of'secret guests', there are likely elements of secrecy and discovery, which are typical in mystery novels.

It could be a family drama. Given the focus on the mother's sins, it's likely to involve a lot of family interactions and conflicts which are typical of the family drama genre.

It could be a literary fiction. Since it focuses on the concept of colors in a novel form, it might be more about exploring complex themes and characters rather than fitting into a more commercial genre like action or romance.

It might even be a romance novel. The moons could be a romantic backdrop, like a place where the characters meet under the light of the moons, and the 'thousand moons' could symbolize the long - lasting or numerous encounters of the lovers.

It could be a romance genre. Maybe the coast road is the place where two lovers meet and their relationship develops against the backdrop of the beautiful coastal scenery.

It might be a slice - of - life genre. Given the title, if it's about the good in people's hearts, it could show different aspects of life and how people with good hearts experience and influence it. It would likely include everyday situations, relationships, and personal growth, which are typical of slice - of - life stories.

It could be a contemporary fiction. Since it involves the modern concept of house swapping.

It might be a fantasy genre. Just think about it. A 'river of stars' is not a common, real - world concept. It could be part of a magical world where such extraordinary things exist. The story could involve magic, mythical creatures, and a hero's journey through this strange and wonderful world.

It could be a thriller. The 'dark' in the title often gives a sense of mystery and danger which are common in thriller novels.