By Lena Zlock Introduction “I cry: sensation!” With these words began our search for what might be an ‘unicum’: the only edition of its kind of Johann Amos Comenius’ Janua linguarum reserata. Ulrich Schäfer, Bibliographischer Berater at the Deutsche Comenius-Gesellschaft first contacted Helen Buchanan of the Bodleian Libraries to enquire about the 1662 copy of …