I have been thinking in writing a novel. A couple ideas of mine:

1. The Skarlett Shinning: A 16 years old girl is kidnapped by a psychopath. After finding herself completely helpless and chained in a basement, she gains some time by telling her kidnapper she would like to murder a human being before dying, just to know what it's like to have that kind of power. This will lead to the kidnapping of a catholic priest and his ultimate death by the hands of this girl. Her fate would not be disclosed at the end.

2. The Dragon Sanctuary: A painter and a writer go to a cabain in the wilderness to create the best possible masterpiece ever. A painting and a book, respectively. However, the writer finds himself without ideas and start developing a strong sense of envy and deep hatred toward the painter. His ultimate choice would be to commit murder and burn down the cabain to the ashes, with the corpse and the painting in it, to then write about it, claiming that all that is left from the biggest painting in the world is his description of it in his novel. This way he "steals" the painting by turning it into a narrative.

What do you think of this ideas? Which one would you choose and why? Do you have any other idea or suggestion?