On the Babylonian Captivity of the Church By: Martin Luther

On the Death of Satyrus and On the Belief in the Resurrection By: Saint Ambrose

On the Exercises of Piety By: Jean Guibert

On the Incarnation By: Athanasius of Alexandria

On The Predestination Of The Saints By: Saint Augustine of Hippo

On the Spirit and the Letter By: Saint Augustine of Hippo

On Virginity By: Gregory of Nyssa

On Virginity (De Virginitate) By: Saint Ambrose

Orthodox Faith By: Saint John of Damascus

Oscar Wilde from Purgatory By: Hester Travers Smith

Other Side of the Hill, and Home Again By: Frank W. Boreham

Pagan & Christian Creeds: Their Origin and Meaning By: Edward Carpenter

Pansies for Thoughts By: Grace Livingston Hill

Parables By: Lyman Abbott

Parables of the Cross By: Isabella Lilias Trotter

Parables of the Lord Jesus Christ - Commentary on the Gospel of St Matthew By: St. John Chrysostom

Paradise Regain'd (version 2) By: John Milton

Paraphrase Upon the Epistle of Paul to the Galatians By: Thomas Boston

Parochial and Plain Sermons, Volume 1 By: John Henry Newman

Pascendi Dominici Gregis (On the Errors of the Modernists) By: Pope St Pius X

Path of Light - The Bodhi-Charyavatara of Santi-Deva By: Shantideva

Paula the Waldensian By: Eva Lecomte

Pearl Maiden By: Henry Rider Haggard

Penny Catechism (Catechism of Christian Doctrine) By: Catholic Truth Society

Percy Wynn, or Making a Boy of Him By: Francis J. Finn, S.J.

Perpetual Virginity of Blessed Mary By: Saint Jerome

Phallic Worship By: Hargrave Jennings

Phillips Brooks By: Mark Antony De Wolfe Howe

Philosophy of the Plan of Salvation By: James Barr Walker

Pilgrim's Progress (version 2) By: John Bunyan

Pilgrim's Progress in Words of One Syllable By: John Bunyan

Pilgrimage Of Etheria By: Etheria

Plan of Salvation By: Benjamin B. Warfield

Plea for Ragged Schools; or, Prevention Better than Cure By: Thomas Guthrie

Poppy's Presents By: Mrs. O. F. Walton

Posthumous Essays of John Churton Collins By: John Churton Collins

Practical Religion By: J. C. Ryle

Practice of Prayer By: G. Campbell Morgan

Pragmatism By: William James

Prayer: Its Necessity, Its Power, Its Conditions By: Ferreol Girardey

Prayers and Meditations By: Samuel Johnson

Prayers of St Paul By: William H. Griffith Thomas

Prayers of the Early Church By: J. Manning Potts

Precepts in Practice; or, Stories Illustrating the Proverbs By: Charlotte Maria Tucker (A. L. O. E.)

Prevailing Prayer: What Hinders It? By: Dwight L. Moody

Priest and His Disciples (Shaw Translation) By: Hyakuzō Kurata

Promulgation of Universal Peace: Vol. I By: Abdu’l-Bahá ‘Abbás

Proper Distinction Between Law and Gospel By: C. F. W. Walther

Prophets and Kings of the Old Testament By: Frederick Denison Maurice

Prose Edda (Brodeur Translation) By: Snorri Sturleson

Psalmes of David (Sidney Psalms) By: Mary Sidney Herbert

Psychology of Religion By: Edwin Diller Starbuck

Psychology of the Unconscious By: Carl Gustav Jung

Purgatory By: Rev. Francois Xavier Schouppe

Purity of Heart By: William Booth

Quaker's Catechism By: Richard Baxter

Quanta Cura & The Syllabus of Errors By: Pope Pius IX

Quatrains of Omar Khayyam of Nishapur By: Omar Khayyám

Queen By: Ottilie Wildermuth

Quiet Talks about Jesus By: Samuel D. Gordon