A clue in wax (Fred M. White)

Fred M. White gives us the opportunity to plunge into the past of Gladys Brooke. The book begins with the perfect life of Gladys in a small town. Then we come back three years ago, where we find out that she has a brother. And they, too, then lived well, but in another place. The main character begins to notice the strange behavior of her brother. At one point, a calm and perfect life ends.