A'mere suggestion' in a short story could be a subtle hint or an idea that is not fully developed or stated directly. For example, an author might make a mere suggestion about a character's hidden past through a passing comment or a brief description of their reaction to something. It's like a little nudge to the reader's imagination, leaving room for them to fill in the blanks.
Overall, 'A Mere Cypher' is a novel that combines mystery and drama. It keeps you guessing with its plot twists and develops characters that you can really connect with. There are layers of subplots that add depth to the story.