- How Thor Lost His Thunder – Declan Taggart (2018) asatru / heathen
- How To Kill A Dragon * Calvert Watkins (1995) comparative mythology
- How To Read Alchemical Texts – Adam McLean (2011) alchemy
- Hyleal, Pri-material, Catholic, or Universal Natural Chaos * Henricus Khunrath (2014) alchemy
- Hymns Of Hermes * G.R.S. Mead (isbn 155818144X) hermetism
- Icelandic Magic – Stephen Flowers (2018) asatru / heathen, occultism
- Idunna #100 (2014) asatru / heathen
- Illuminating the legacy of Marija Gimbutas – Harald Haarmann (2023) history
- Im Namen Des Wolfs – Andreas Hebestreit (2013) asatru / heathen, comparative mythology
- Images And Symbols – Mircea Eliade (1952/1991) comparative mythology, comparative religion, symbolism
- In De Marge Van De Beschaving * Marco Mostert (2009) history
- In Search Of The Indo-Europeans * J.P. Mallory (isbn 0500276161) comparative mythology
- India’s Glory – Raghupati Bhatt (2014) history
- Indo-European Mythology And Religion – Alexander Jacob (2019) comparative mythology
- Industrial Evolution * Mick Fish (2002) music
- Initiation & Spiritual Realization * René Guénon (2004) esotericism, religion, symbolism, traditionalism
- Intellectual Gallery * Troy Southgate (2014) philosophy
- Introduction To Magic – Julius Evola (2001) occultism
- Introduction to Magic, volume II – Julius Evola (editor) (2019) occultism
- Introduction to Magic, volume III – Julius Evola (editor) (2021) occultism
- Introduction To The Study Of The Hindu Doctrines * René Guénon (2004) religion, traditionalism
- Isis Unveiled * Helena Petrovna Blavatsky (isbn 0911500030) theosophy
- Islamic Life And Thought – Seyyed Hossein Nasr (2001) religion
- Íslendingabók and Kristni Saga * translated by Siān Grønlie (2006) asatru / heathen, history
- Jacob Boehme * Robin Waterfield (2001) esotericism, philosophy
- Jan Amos Comenius * Henk Woldring (2014) history
- Jesus – one hundred years before christ * Alvar Ellegård (isbn 1585672521) history, religion
- Johannes Bureus and Adalruna * Stephen E. Flowers (1998 Rûna Raven Press) asatru / heathen, esotericism
- John Dee * Gerard Suster (2003) esotericism, history
- John Dee’s Five Books Of Mystery * Joseph H. Peterson (ed.) (1578631785) esotericism, occultism
- Journeys In The Kali Yuga – Aki Cederberg (2017) esotericism, spirituality
- Kabbala Juive et Cabala Chrétienne * L. Gorny (1977) kabbalah
- Kabbalah * Charles Poncé (isbn 0835605108) kabbalah
- Kabbalah tradition of hidden knowledge * Z’ev Ben Shimon Halevi (isbn 0500810230) kabbalah
- Kabbalah, de complete gids * Alexandra Gabrielli (isbn 906271664X) kabbalah
- Kabballah * Gershom Scholem (1978) kabbalah
- Kalevala * Elias Lönnrot (isbn 9062380778) anthroposophy
- Kelten En De Lage Landen * Herman Clerinx (2005/6 davidsfonds * isbn 905826324X) celts, history
- Keltische Mythologie * David Bellingham (ISBN: 9057640077) celts
- King Arthur In The Netherlands * Martine Meuwese (editor) (BPH 2005) celts
- Kleines Mystisch-Magisches Bilderbüchlein – Heinrich Tränker (2021) alchemy
- Knaurs Lexikon Der Symbole * Hans Biedermanss (isbn 3828941532) symbolism
- Knowledge Of The Symbol – Arturo Reghini (2022) symbolism, traditionalism
- Koning Artur In De Nederlanden * J.D. Janssens (1985) history, mythology
- Kosmische Hiërachieën * Rudolf Steiner (isbn 906038539X) anthroposophy
- Kratos: The Hellenic Tradition * Gwendolyn Taunton (editor) (2013) history
- Kultische Geheimbünde Der Germanen * Otto Höffler (1934) asatru / heathen
- Langs Hermes’ Wegen hermetism
- Le Secret Des Keltes * Lancelot Lengyel (1969) celts
- Leicht Entflammbares Material * Josef K. (2000) music
- Les Kabbalistes Chrétiens De La Renaissance * François Secret (1985) kabbalah
- Lichaam Eer En Recht In Middeleeuws Friesland * Han Nijdam (2008) asatru / heathen, history
- Licht op Alchemie * Frank Greiner (isbn 9063255640) alchemy
- Liederen En Dansen Uit De Kempen * Harrie Franken (1978 / 2003 stichting brabants heem) folklore, regional
- Living Asatru * Stephen A. McNallen * 1993 asatru / heathen, asatru folk assembly
- Loki * Georges Dumézil (1948/1959) asatru / heathen, comparative mythology
- Looking For Europe, neofolk und hintergründe * Andreas Diesel & Dieter Gerten (isbn 3936878021 * 2005) music, occulture
- Lords Of The Left Hand Path – Stephen Flowers (2012) occultism
- Lovers Of Sophia – Jason Reza Jorjani (2017) philosophy
- Lull & Bruno * Frances Amelia Yates (isbn 0710009526) esotericism
- Luvah Journal 1/1 and 1/3 journal, traditionalism
- Luvah Journal 1/2 journal, traditionalism
- Luvah Journal volume four journal, philosophy, traditionalism
- Magic Mirrors – Paul Sédir (1907/2019) esotericism
- Major Trends In Jewish Mysticism * Gershom G. Scholem (1941 * isbn 0805210423) kabbalah
- Male Mysteries And The Secret Of The Mannerbund – Wulf Grimsson (2011) asatru / heathen
- Man And His Becoming According To The Vedanta * René Guénon (1925) esotericism, religion, traditionalism
- Man And Time * Joseph Campbell (editor) (1957) comparative religion, psychology
- Many Peoples Many Faiths * Robert S. Ellwood (isbn 0131830392) comparative religion, religion
- Marsilio Ficino * Angela Voss (2006) esotericism, philosophy
- Marsilio Ficino Essays philosophy
- Marsilio Ficino; 500 jaar later (isbn 9067322318) esotericism, rosicrucianity
- Martin Heidegger: Between Good and Evil * Rüdiger Safranski (isbn 0674387104) philosophy
- Masonic And Esoteric Heritage – Andréa Kroon, Marty Bax, Jan Snoek (2005) freemasonry
- Masonic Myths and Legends – Pierre Mollier (2022) freemasonry
- Memory Palaces And Masonic Lodges – Charles B. Jameux (2014/9) esotericism, freemasonry
- Men Among The Ruins * Julius Evola (2002) esotericism, politics
- Mesopotamian Myths * Henrietta McCall (isbn 0292751303 * 1991) mythology
- Midwinterse Tradities * Aat van Gilst (2014) folklore, history
- Midzomer In Europa * Aat van Gilst (2006 aspekt * isbn 9059114736) asatru / heathen
- Mímir – Journal Of North European Traditions * Gwendolyn Taunton (editor) (2011) asatru / heathen, journal, traditionalism
- Mirages In Western Science Resolved By Occult Science * Edi D. Bilimoria theosophy
- Mitra-Varuna * Georges Dumézil (1940/48 * 1996) asatru / heathen, comparative mythology, comparative religion, religion
- Modern Paganism In World Cultures * Michael Strmiska (editor) (2005) asatru / heathen, comparative religion
- Monas Hieroglyphica * John Dee (isbn 157863203X) esotericism
- Mushrooms, Myth & Mithras – Ruck, Hoffman, Celdrán (2011) mythology
- Mysterieplaatsen En Inwijdingswegen * Rudolf Steiner (isbn 9060385381) anthroposophy
- Mystic Underground – Konstantin Serebrov (2001) spirituality
- Mysticism After Modernism – James O’Meara (2020) philosophy, politics
- Myth And Law Among The Indo-Europeans * Jaan Puhvel (editor) (1970) comparative mythology
- Myth, Magic & Masonry – Jaime Paul Lamb (2018) esotericism, freemasonry
- Myths And Symbols In Pagan Europe * H.R. Ellis Davidson (1988) asatru / heathen, celts
- Myths Of The Norsemen * Hélène Adeline Guerber (1909 Dover 1992 * isbn 0486273482) asatru / heathen
- Nag Hammadi geschriften I & II * Jacob Slavenburg + Wim G. Glaudemans (isbn 9020219499 + 9020219502) gnosticism, hermetism, religion
- Necronomicon * ‘Simon’ (1980 avon * isbn 0380751925) occultism
- Nederlandse Religiegeschiedenis * Joris van Eijnatten & Fred van Lieburg (isbn 9065507868) history, religion
- New Imperium #4 magazines
- Nietzsche En Kant Lezen De Krant * Rob Wijnberg (2009) philosophy, politics
- Nietzsche, a philosophical biography * Rüdiger Safranski (isbn 0393323803) philosophy
- Nightside Of The Runes – Thomas Karlsson (2019) asatru / heathen, esotericism