Letters to Malcolm: Chiefly on Prayer is a book by C. S. Lewis, published posthumously in 1964. The book takes the form of a series of letters to a fictional friend, "Malcolm", in which Lewis meditates on prayer as an intimate dialogue between man and God.
In his posthumous work "Letters to Malcolm: Chiefly on Prayer," C.S. Lewis presents a series of letters addressed to a fictional friend named Malcolm, where he delves into the nature of prayer as an intimate dialogue between humanity and God.