This rare antique book, "Their Father's God" by O.E. Rolvaag, published in 1931 by Harper & Brothers, is a must-have for any collector of antiquarian books. The hardcover binding and English language make it a valuable addition to any collection, while its subject matter on religion and spirituality adds a level of depth and significance. The book is an original first edition, making it even more prized. Don't miss out on the opportunity to own this piece of literary history.