The product is a lot of four books by Calvin Miller titled "The Singer," "The Song," and "The Finale." These vintage novels, published in the 1970s by InterVarsity Press, are intended for an adult audience and are written in English. Each book in the lot features illustrations and is in trade paperback format. With a compact size of 4.5 inches in width and 0.5 inches in height, these books weigh a total of 6.1 ounces. The narrative type of these fiction novels by Calvin Miller offers a captivating and thought-provoking reading experience for fans of his work.