"The Christian's Secret of a Happy Life" by Hannah Whitall Smith is an antique hardcover book published in 1915 by Fleming H. Revell in the United States. This original edition, printed in 1915, delves into the topic of religion and spirituality, offering a unique perspective on a happy Christian life. Written in English by the North American author, this collectible book is a valuable addition to any library, especially for those interested in religious texts and classical literature.