This is a paperback book titled "Fifty Shades Darker," written by E. L. James as part of the Fifty Shades of Grey series. Published by Sourcebooks, it is 8 inches in length, 5.2 inches in width, and 1.4 inches in height. The book is in English, weighs 13.7 ounces, and contains 544 pages. It falls under the genres of fiction, erotica, contemporary romance, and is targeted towards contemporary women readers.