Final answer:
The passage suggests a narrative where a character suspects his uncle of murder, but without more context, it's not possible to determine the specific book being referred to.
Step-by-step explanation:
The passage provided implies a narrative context where a character suspects that his uncle killed his cousin, a common thematic element in literature. However, the excerpt itself does not provide enough information to specify which book contains this narrative thread. Without additional context or identifying specifics within the passage linking to a known work, it is not possible to confidently provide the title of the book in question. Nevertheless, themes of accusation, deception, and murder are prevalent in classics of literature, and could point to a wide array of novels or stories including mysteries, historical fiction, and gothic novels among others.