This captivating novel by Dean Koontz, titled "Relentless," is a first edition hardcover book published in 2009 by Random House Publishing Group. The book has 368 pages and weighs 20.8 ounces. It measures 9.6 inches in length, 1.3 inches in height, and 6.5 inches in width.

The story falls under the genres of thrillers and horror and is the perfect fit for young adults and adults. This novel features an exciting narrative type of fiction that is sure to keep the reader engaged. The book is in excellent shape and is a vintage edition.