Final answer:
The described scenario of the main character's cousin taking him to the mall instead of historical sites is not clearly identifiable in the provided texts, thus a specific book cannot be confirmed.
Step-by-step explanation:
The book in which the main character's cousin takes him to the mall instead of local historical sites is not clearly identified amongst the provided reference texts. However, the passages seem to relate to character interactions and daily routines, rather than specific plot points about visits to a mall or historical sites. Without more context or a direct mention of such an event, it is challenging to confidently ascertain which book contains the described scenario. Therefore, I am unable to provide a specific answer to this question.