What suggests that the narrator may be unreliable is the fact that the narrator believes that an ordinary book is proof of the existence of aliens.
A good narrator is the individual who can write a text that engages and retains the reader's attention, this can be achieved through an adequate textual structure and aligned with the purpose of the text, if it is a fictional text for example, the narrator can use language sensory and descriptive to generate greater emotion in the reader.
Therefore, a narrator must always aim to engage the reader, through well-constructed and detailed texts.
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