Suppose The book 'Harry Potter and the Philosopher's Stone' by J.K. Rowling was first published in 1997. It follows the story of a young wizard, Harry Potter, and his friends Hermione Granger and Ron Weasley as they navigate their first year at Hogwarts School of Witchcraft and Wizardry.
Can we infer that "Harry Potter and the Philosopher's Stone is the last book in the series."? Yes, no, or maybe?