Dragonfly effect

What if I told you that there was a year that was completely lost from history? A year that no records recorded and no one remembered, as if it had never happened, but that is another story you will know later.
The events of the novel begin when an old building appears out of nowhere in Alexandria, an unknown building shrouded in mystery and no one enters it, until its residents invite a famous author to live with them, then they offer him a strange mission fraught with dangers, murder, and mysteries, in which he travels to a year that has been completely lost from human history in An attempt to stop an obsessed serial killer and a Protestant killer with an extremist religious tendency who killed 12 young women in what was known as the "Throw of the Virgin Killer" at the end of the 19th century, in metropolitan Alexandria, where everything has a magician, and where killing is more heinous and heinous.