Mirror deception

In a joyful family atmosphere, "Carrie Louise" invited her friend from days ago to study "Marble" so she could spend some days with her at her house after years had separated them. And while the days passed, and everything was fine, there was a strange character for a person named "Edgar". Sometimes he thought he was the son of "Churchill" or that he was the "son" of Einstein, and he knew nothing about his childhood, and that was a clear sign in all his actions and behavior. There was a kind character, which was "Christian Jørbranden", who inherited goodness from his father, as his father established a charitable foundation, and when he came to visit this lady, a horrific murder occurred to him. I wonder who the murderer is, and who has a stake in killing Mr. Christian. Author: Agatha Christie Number of pages: 284 Published by Jarir Bookstore