Abckiria (also sometimes spelled ABC-kiria, and spelled "ABC-kirja" in modern Finnish), in English "The ABC book", is the first book published in Finnish language. It was written by a bishop and reformist Mikael Agricola, and was first published in 1543. Agricola made the book while working on the first Finnish translation of the New Testament (which was eventually finished in 1548 as Se Wsi Testamenti).