"One By One" by Ruth Ware is a 384-page fiction novel published by Gallery Books in 2020. This thrilling psychological suspense book is intended for a trade audience and is written in English. The hardcover format measures 9 inches in length, 6 inches in width, and 1.2 inches in height, with a weight of 20.1 ounces. It falls under the genres of thrillers, with themes of psychological suspense and literary fiction.