Yes, and more than once. All were purchased once released in the US, thus in hardback. A young niece highly recommended it, and her mother (my sister), a high school English teacher, agreed.
What was appreciated about the series was how, not only the characters developed over time, in addition to the growing maturity of the writing to coincide with the targeted readers as they developed, but the fact that it was so strategically written. There were very few questions, if any, left unanswered. A final caveat was that all of the characters have personality flaws, making them come across as “humanly.”
As for the films, they are owned as well; a gift form my SO. Overall, they are well-made, other than “HP and The Goblet of Fire.” It made too many changes from the novel that were unnecessary.
My niece is now an adult, married, and they have a young child who loves to read. I look forward to the day that she is old enough to be introduced to the HP series.