Whispering Walls by Mildred Wirt invites readers into another thrilling adventure with Penny Parker, the ever-curious young reporter. When Penny visits a friend's historic estate, she becomes intrigued by eerie whispers and mysterious happenings within its ancient walls. Rumors of a hidden treasure fuel her determination to unravel the secrets locked inside. As Penny digs deeper, she discovers that the house holds more than just whispers-it...