Final answer:
The correct form of the verb 'interesar' is 'nos interesan' for the subject 'nosotros' in the given sentence
Step-by-step explanation:
The correct form of the verb 'interesar' to complete the sentence 'A nosotros __ los libros de Harry Potter' is 'nos interesan'.
'Nos interesan' is used because the subject 'nosotros' is plural, and as a result, the verb 'interesar' needs to be in the plural form as well.
For example, 'A nosotros nos interesan los libros de Harry Potter' translates to 'We are interested in the Harry Potter books'.
Learn more about Spanish verb conjugation