Kai Brodersen and Christiane Brodersen, eds. Planudes Rechenbuch. De Gruyter, 2020. 

From De Gruyter

Maximos Planudes, a classically educated scholar and teacher of the 13th century, demonstrates in his "Mathematics according to the Indians" how even complicated mathematical problems can be solved easily. To achieve this, he uses the innovative concept of "zero" which had come to Europe from India via the Arab world. This highly influential book is now presented in a fresh bilingual edition.