I think 'caricatura del tiempo' might refer to a caricature or illustration related to time. Maybe it's a creative way to represent the concept of time in a humorous or exaggerated way.
Since I haven't read 'The Return' by Edith Tiempo, it's hard to say exactly. However, many works of literature deal with common themes such as love, identity, and the passage of time. It's possible that this story also explores these or related themes. For example, if the story is about a character returning to a place, themes of memory and change might be present. Or if there are relationships between characters, themes of loyalty and betrayal could be involved.