Knowledge of God: Ancient Spirituality of the Christian East by Harry Boosalis

Shepherd of Souls by Elder Cleopa

Little Russian Philokalia Vol 5: St Theodore by Seraphim Rose

Every Sigh Can Be a Prayer by Elder Arsenie Papacioc

Beginnings of a Life of Prayer by Archimandrite Irenei

Words For Our Time by Mattew the Poor

The Struggle for Virtue by Averky (Taushev)

On the Apostolic Tradition by St. Hippolytus

The Love of God: The Life and teachings of Gabriel of the Seven Lakes Monastery

Optina Series Vol. 9: Elder Nikon of Optina

Optina Series Vol. 8: Elder Anatole the Younger of Optina

Optina Series Vol. 7: Elder Barsanuphius of Optina

Optina Series Vol. 2: Elder Anthony of Optina

Optina Series Vol 1 - Elder Leonid of Optina by Fr. Clement Sederholm

The Place of the Heart: An Introduction to Orthodox Spirituality by Elisabeth Behr-Sigel

On the Soul and Resurrection by St. Gregory of Nyssa

On Pascha by Melito of Sardis (2nd edition)

Living in Christ: Essays on the Christian Life by Mother Raphaela

Christ is in our Midst: Letters From a Russian Monk by Father John

The Song of Tears by Olivier Clement