Suppose J.K. Rowling is the author of the Harry Potter book series. The first book, "Harry Potter and the Philosopher's Stone", was released in 1997. The series follows the journey of a young wizard named Harry Potter and his friends Hermione Granger and Ron Weasley as they battle the dark wizard Lord Voldemort.
Can we infer that J.K. Rowling wrote a total of 8 books in the Harry Potter series?