Real name: Franz-Josef Terhart

Franz-Josef Terhart (* June 4, 1954 in Essen; † June 16, 2020 in Rheurdt) was a German writer. His best-known and best-selling book is I - Grace O'Malley. He focused on children's books, non-fiction, and Ireland.

Franjo Terhart was a trained Latin and philosophy teacher. From 1981 to 1985 he worked as a teacher. While still studying to become a teacher, he worked as a lecturer in literature and philosophy and also did journalistic work for the WDR, the Neue Rhein Zeitung, and other newspapers. From 1991 to 2016, he was a freelance cultural representative in Neukirchen-Vluyn.

Terhart's oeuvre includes mainly nonfiction in the fields of esotericism, religion, and mysticism, but also historical novels, children's books with historical and fantasy themes, and novels about Ireland. Some of his books have been translated into Estonian, Italian, Romanian, Spanish, French and Turkish.