Check out this legally free ebook:
- Three Catholic Reformers of the Fifteenth Century, by Mary H. Allies (London: Burns & Oates, 1878). Available in various formats at Internet Archive, Open Library, and Open Library (2nd copy). [The work concerns Saint Vincent Ferrer (1350-1419), Saint Bernardino da Siena (1380-1444), and Saint John of Capistrano (1386-1456).]
Posted in remembrance of the Siege of Belgrade, which ended on 22 July 1456, in which outnumbered soldiers and ill-trained peasants led by John Hunyadi and Saint John of Capistrano held back the Islamic forces that threatened the Eastern Marches of Christendom.