"In the Skin of a Monster" by Kathryn Barker is a captivating young adult novel that blends elements of mystery, thriller, and science fiction. The story revolves around Alice and her twin sister, Poppy, who live in a small Australian town haunted by the aftermath of a devastating school shooting. When Alice discovers a strange device that allows her to enter an alternate reality where she can alter events leading up to the shooting, she becomes embroiled in a complex web of secrets and lies. As Alice delves deeper into the mystery, she must confront her own guilt and fears while unraveling the truth about what really happened on that fateful day. With its compelling narrative and thought-provoking themes of trauma, guilt, and the power of choice, "In the Skin of a Monster" is a riveting read that will keep readers on the edge of their seats until the very end."