Suppose Harry Potter and the Philosopher's Stone is the first novel in the Harry Potter series written by J.K. Rowling. It is Rowling's debut novel and the first novel in the Harry Potter series. The plot follows Harry Potter, a young wizard who discovers his magical heritage as he makes close friends and a few enemies in his first year at the 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?