Suppose J.K. Rowling is a British author and philanthropist. She is best known for writing the Harry Potter fantasy series, which has won multiple awards and sold more than 500 million copies, becoming the best-selling book series in history. Rowling's personal story of overcoming adversity has inspired many fans around the world.
Can we infer that "Rowling's books have only been successful in the UK."? Yes, no, or maybe?