Suppose Harry Potter and the Philosopher's Stone is the first book in the Harry Potter series written by J.K. Rowling. It follows the story of a young boy named Harry who discovers he is a wizard and attends Hogwarts School of Witchcraft and Wizardry. The book was first published in 1997 and became a global sensation, leading to a successful film franchise.
Can we infer that "Harry Potter and the Philosopher's Stone was the last book in the series."? Yes, no, or maybe?