In 1965, Zettersten presented his doctoral thesis on the AB language, a medieval literary dialect first identified by J.R.R. Tolkien. And during the 1960s in Oxford, Zettersten became a friend and colleague of Tolkien, as they both shared an interest in a certain collection of medieval manuscripts (the "Katherine Group"). Their contact continued throughout the last 13 years of Tolkien's life.
Selected bibliography of works concerned with J.R.R. Tolkien.
- 1966: English Studies 47 (Amsterdam)
- "J.R.R. Tolkien. The English Text of the Ancrene Riwle - Ancrene Wisse" (pp.290-292; [Review])
- 2004: The Invented Worlds of J.R.R. Tolkien [also published in The Lord of the Rings 1954-2004: Scholarship in Honor of Richard E. Blackwelder (2006)]
- "The AB Language Lives"
- 2006: J.R.R. Tolkien Encyclopedia: Scholarship and Critical Assessment, entries:
- "AB Language"
- "Ancrene Wisse"
- "Katherine Group"
- 2008: Lembas Extra: Proceedings of the 5th Unquendor Lustrum
- "Discussing language history with J.R.R. Tolkien"
- 2008: Tolkien - min vän Ronald och hans världar
- 2011: J.R.R. Tolkien's Double Worlds and Creative Process
- ↑ "Foreword", in Worlds of Words. A Tribute to Arne Zettersten. Nordic Journal of English Studies. Special Issue, Volume 3, No. 1 (2004; editor: Cay Dollerup).