Maybe there are themes related to the afterlife. Since death is a major part of the title, the novel may speculate on what comes after death. It could also be about the value of life, making readers reflect on how precious life is in contrast to the inevitable end which is death.
One of the main themes could be mortality. Given the title has 'death' in it, it might explore different aspects of death like how characters face it, their fears or acceptance. Another theme could be the human condition in general, as stories often use various characters and situations to show different facets of being human.
One main theme is the contrast between life and death. It shows how life can be full of surprises and how death is an inescapable part of it, all while maintaining a humorous tone.
I'm not sure as I haven't read the 'Death and Other Stories Novel'. But typically in such a collection, there could be a diverse range of characters. There might be an older character who has seen a lot in life and has a unique perspective on death. Maybe a young character who is just starting to understand the concept of death through a tragic event.
One of the main themes is probably the horror and chaos that the Black Death brought. People were dying in large numbers, and there was panic everywhere. Another theme could be the breakdown of society. Normal social structures like family and community were severely disrupted.
In Love Death and Robots stories, love is not just simple affection. It could be a desperate love in a post - apocalyptic world. Death is depicted in different scenarios, sometimes as a consequence of war or a natural disaster. The robots aspect deals with the power of technology. For example, robots might be the cause of death in some stories, or they could be the ones trying to preserve love and life in a dying world.
As I don't know the actual content of '509 life and death arrangement stories', I can't determine the main themes.
One common theme is the search for truth. In 'Death Among Friends' and many other detective stories, the detective is trying to figure out what really happened. Another theme is deception. There are often characters who are lying or hiding something. For example, in 'The Murder of Roger Ackroyd' by Agatha Christie, the killer is very deceptive.
One of the main themes is justice and revenge. The characters often grapple with their own concepts of what is just and how far they will go to right perceived wrongs.
One of the main themes is the pursuit of beauty. The protagonist is drawn to the beauty of a young boy in Venice. Another theme is the struggle with self - control. He can't resist his growing obsession. Also, there is the theme of decay and death which is symbolized by the plague spreading in Venice.
One of the main themes is the concept of justice. Light Yagami believes he is creating a new world of justice by using the Death Note to kill criminals, but his actions are morally ambiguous. Another theme is the power of knowledge. The power of the Death Note and how to use it effectively is based on understanding its rules.
One of the main themes could be the fall of a great leader. Napoleon's death symbolizes the end of an era of his dominance. Another theme might be the passage of time and how even the mightiest are subject to it.