One possible theme could be the fear of the unknown. Dark stories often play on our fears of what we don't understand.
Another theme might be the battle between good and evil. In many dark stories, there is a struggle between forces of light and darkness, and this could be the case in 'kamion and other dark stories' as well. There could be characters or elements that represent good trying to combat the dark elements. Well, this is just speculation without having read the specific work in detail. But it's a common theme in the genre of dark stories.
I'm not sure about works exactly like 'kamion and other dark stories'. But 'The Strange Case of Dr. Jekyll and Mr. Hyde' has a bit of a dark undertone. It's about a man with a split personality, one good and one evil.
The main themes could revolve around the idea of secrets. Since it's 'the dark and other love stories', there may be hidden aspects in the relationships, secrets that either bring the characters closer or drive them apart. And of course, the theme of redemption could be there too. Characters might seek redemption through love, especially if they have made mistakes in the past in the context of relationships.
Well, 'The Dark Eidolon and Other Stories' likely has themes related to the struggle between different powers. This could be the power of the mind against the power of the supernatural. It may also deal with themes of isolation, as characters often find themselves alone in strange situations. And the theme of transformation could be present too. Characters might change as a result of their encounters with the dark and mysterious elements in the stories.
Love and loss could be one of the main themes. In many of the stories, characters experience the pain of losing love or the bittersweet memories associated with past relationships.
The main themes in 'The Dark River and Other Stories' are likely to be diverse. There could be a theme of fear. The 'dark' in 'dark river' might evoke a sense of fear or unease. Also, the concept of change might be a theme. As the stories unfold, characters might experience changes in their lives, and the river could be a metaphor for the passage of time and the changes it brings.
One of the main themes could be mystery. The 'dark intruder' in the title implies something unknown and menacing, which often leads to a sense of mystery throughout the stories. Another theme might be the exploration of the human psyche, as characters may face their fears or inner demons when dealing with the intrusions or strange events in the stories.
One possible theme could be fear. The very idea of a dark house often evokes a sense of unease and terror. Another theme might be mystery. There could be secrets hidden within the walls of the house that the characters are trying to uncover. For example, the mystery of what happened to the previous owners or what lurks in the attic.
One possible theme could be fear. The darkness of the room can symbolize the unknown, which often induces fear in people.
Isolation could be a theme. A dark tale might be set in a desolate place or the characters might be isolated in some way, which adds to the overall sense of gloom. Also, the theme of loss can be present. This could be the loss of a loved one, of innocence, or of hope, all of which contribute to the darkness of the story. For example, in a story where a character has lost their family in a tragic event, it sets a very dark mood.
Another theme might be isolation. At night, especially if it's very dark, a person can feel alone and cut off from the rest of the world. This sense of isolation can be a strong theme in the story.