Suppose Harry Potter and the Philosopher's Stone is the first book in the Harry Potter series written by J.K. Rowling. It was first published in 1997 by Bloomsbury in the United Kingdom and later by Scholastic in the United States. The story follows a young wizard named Harry Potter who discovers his magical heritage and attends Hogwarts School of Witchcraft and Wizardry.
Can we infer that "Harry Potter and the Philosopher's Stone was the last book in the series"? Yes, no, or maybe?