Vergessene Kulturen der Weltgeschichte, München: C.H.Beck, 2019 (ISBN978-3-406-73410-6) .
Wer zivilisierte die Alten Griechen? Das Erbe der Alteuropäischen Hochkultur. Marix Verlag, Wiesbaden 2017, (ISBN978-3-7374-1065-6).
Plato's philosophy reaching beyond the limits of reason: contours of a contextual theory of truth'. Philosophische texte und studien, 121. Hildesheim; Zürich; New York: Olms-Weidmann, 2016. (376 p.) (ISBN9783487155425).
2016 - Auf den Spuren der Indoeuropäer. Von den neolithischen Steppennomaden bis zu den frühen Hochkulturen. Munich: C.H. Beck. (ISBN978-3-406-68824-9)
2015 - Myth as source of knowledge in early western thought. The quest for historiography, science and philosophy in Greek antiquity. Wiesbaden: Harrassowitz, (ISBN978-3-447-10362-6).
2014 - Roots of ancient Greek civilization. The influence of Old Europe. Jefferson, North Carolina: McFarland. (ISBN978-0-7864-7827-9)
2013 - Ancient knowledge, ancient know-how, ancient reasoning. Cultural memory in transition from prehistory to classical antiquity and beyond. Amherst, New York: Cambria Press. (ISBN978-1-60497-852-0)
2013 - Mythos Demokratie. Antike Herrschaftsmodelle im Spannungsfeld von Egalitätsprinzip und Eliteprinzip. Frankfurt, Berlin, New York: Peter Lang. (ISBN978-3-631-62599-6)
2012 - Indo-Europeanization - day one. Elite recruitment and the beginnings of language politics. Wiesbaden: Harrassowitz. 978-3-447-06717-1.
2011 - Das Rätsel der Donauzivilisation. Die Entdeckung der ältesten Hochkultur Europas. Munich: C.H. Beck. (ISBN978-3-406-62210-6)
2009 - Interacting with figurines. Seven dimensions in the study of imagery. West Hartford, Vermont: Full Circle Press. (ISBN978-0-9790046-3-6)
2008 (co-author Joan Marler) - Introducing the Mythological Crescent. Ancient beliefs and imagery connecting Eurasia with Anatolia. Wiesbaden: Harrassowitz. (ISBN978-3-447-05832-2)
2008 - Weltgeschichte der Zahlen [World history of numbers]. Munich: C.H. Beck knowledge, volume 2450. (ISBN978-3-406-56250-1)
2007 - Foundations of culture: Knowledge-construction, belief systems and worldview in their dynamic interplay. Frankfurt, Berlin, New York: Peter Lang. (ISBN978-3-631-56685-5)
2006 - Weltgeschichte der Sprachen. Von der Frühzeit des Menschen bis zur Gegenwart [World history of languages. From the early period of humans up to the present]. Munich: Becksche Reihe, volume 1703. (ISBN3-406-55120-3)
2005 - Encyclopaedia of extinct peoples. From Akkader to Zimbern. Munich: Becksche Reihe, volume 1643. (ISBN3-406-52817-1)
2005 - Schwarz: Eine kleine Kulturgeschichte [Black: A brief cultural history]. Frankfurt, Berlin, New York: Peter Lang. (ISBN3-631-54188-0)
2004 - Small encyclopaedia of peoples. From Aborigines to Zapotecs. Munich: Becksche Reihe, volume 1593. (ISBN3-406-51100-7)
2004 - Elementary word order in the languages of the world. Documentation and analyses of the emergence of word order patterns. Hamburg: Helmut Buske. (ISBN3-87548-372-3)
2003 - History of the deluge. In search of the early civilizations. Munich: Becksche Reihe, volume 1536. (ISBN3-406-49465-X) (2nd ed. 2005)
2002 - Geschichte der Schrift [History of writing]. Munich: C.H. Beck knowledge, volume 2198. (ISBN3-406-47998-7) (2nd ed. 2004; 3rd ed. 2007)
2002 - Lexikon der untergegangenen Sprachen [Encyclopaedia of extinct languages]. Munich: Becksche Reihe, volume 1456. (ISBN3-406-47596-5) (2nd ed. 2004)
2002 - Sprachen-Almanach. Zahlen und Fakten zu allen Sprachen der Welt [Language yearbook. Numbers and facts about all languages of the world]. Frankfurt, New York: Campus. (ISBN3-593-36572-3)
2001 - Small encyclopaedia of languages. From Albanian to Zulu. Munich: Becksche Reihe, volume 1432. (ISBN3-406-47558-2) (2nd ed. 2002)
2001 - Babylonian world. History and future of languages. Frankfurt, New York: Campus. (ISBN3-593-36571-5)
2001 - The small languages of the world: Existential threats and chances of survival. A comprehensive documentation. Frankfurt, Berlin, New York: Peter Lang. (ISBN3-631-37173-X)
1998 - Religion und Autorität. Der Weg des Gottes ohne Konkurrenz [Religion and authority. The way of the gods without competition]. Hildesheim: Olms. (ISBN3-487-10507-1)
1996 - Die Madonna und ihre griechischen Töchter. Rekonstruktion einer kunturhistorischen Genealogie [The Madonna and her Greek daughters. Reconstruction of a cultural-historical genealogy]. Hildesheim: Olms. (ISBN3-487-10163-7)
1995 - Early civilization and literacy in Europe. An inquiry into cultural continuity in the Mediterranean world. Berlin, New York: Mouton de Gruyter. (ISBN3-11-014651-7)
1993 - The world of European languages. History and future of the language nations between Atlantic and the Urals. Frankfurt, New York: Campus. (ISBN3-593-34825-X)
1990 - Universal history of writing. Frankfurt, New York: Campus. (ISBN3-593-34346-0) (4th ed. 1998)