Sorted by Library of Congress catalog number, where available; books without a catalog number are sorted by date.

• The Method of Mental Prayer
  Rev Francis Nephew, S.J.
  London, Thomas Hales, 1694

• Opus Contemplationis Divi Bonaventuræ: Points for Mental Prayer
  Paraphrased by K. D. B.
  London: Burns, Oates & Company, 1880

• A Golden Treatise of Mental Prayer
  BV 209 .P42 1844
  St Peter of Alcantara, O.F.M.
  Translated by Giles Willoughby, O.F.M.
  Philadelphia, M. Fithian, 1844

• The Art of Mental Prayer
  BV 210 .F9 1935
  Bede Frost of Nashdom Abbey, Burnham, Buckinghamshire
  London, Philip Allan, 1935
  From the Anglo-Catholic Benedictine monastery of Nashdom.

• The Practice of Mental Prayer
  BV 210 .M42 1915
  Rev René Maumigny, S.J.
  PJ Kenedy & Sons, 1915
  First Treatise, Ordinary Prayer (pdf held hostage by the Hathi Trust)
  Second Treatise, Extraordinary Prayer
  An original work on the subject.

• The Ways of Mental Prayer
  BV4813 .L4313 1960
  Dom Vitalis Lehodey, Abbot of Briquebec, O.C.R.
  Dublin, M. H. Gill & Son, 1960
  An English translation of the 1928 French edition, which was an original work on the subject.

• Exercise of Mental Prayer
  BV 4813 .S5 1887
  Fr Joseph Simler, S.M.
  Nazareth near Dayton Ohio, 1887

• The spiritual life; a treatise on ascetical and mystical theology, 2nd ed
  BV 5032 .T19
  Very Rev. Adolphe Tanquerey, S.S., D.D.
  Society of St John the Evangelist
  Desclée, Tournai, Belgium, 1930

• The Directorium Asceticum; or, Guide to the Spiritual Life
  BV 5034 .5313 1902
  John Baptist Scaramelli, S.J.
  R & T Washbourne, London; Benziger, New York; 5th ed. 1902
  Volume 1
  Volume 2
  Volume 3
  Volume 4

• Meditations on the Mysteries of our Holy Faith Together With a Treatise on Mental Prayer
  BX 2186 .P8 1852
  Ven. Louis de Ponte, S.J.
  Richardson & Son, London, 1864
  Volume 1
  Volume 2
  Volume 3
  Volume 4
  Volume 5
  Volume 6

• A Treatise on Mental Prayer
  BX 2186 .P93 1929
  Ven. Louis de Puente, S.J.
  London, Burns, Oates & Washbourne Ltd., 1929
  The introductions to Puente’s 6 volumes woven together into a book.

• The Christian Life and Virtues Considered in the Religious State
  BX 2350 .G3613 1878
  Mgr. Charles-Louis Gay
  English translation of the 6th French edition by Abbot Burder, O.C.R.
  London: Burns & Oates, 1878
  Volume 1
  Volume 2
  Volume 3

• The Via Vitæ of St. Benedict: The Holy Rule Arranged for Mental Prayer
  BX 3004.Z5 H49 1908
  Dom Bernard Hayes
  New York, Cincinnati, Chicago, Benziger Brothers, 1908
  An original Benedictine work on the subject.