¡Caiñgat Cayo! / Sa mañga masasamang libro,t, casulatan

The pamphlet warns readers about harmful books and writings and urges them to avoid, surrender, or destroy such materials; it reviews ecclesiastical rules forbidding vernacular translations of Scripture, certain popular romances and plays, alleged miraculous devotions, and manuals for divination or love charms, and it explains moral and canonical penalties for reading or keeping prohibited works. It offers practical guidance for recognizing suspect texts and emphasizes Church authority in regulating reading, while a prefatory note records that the tract prompted public rebuttals.