Context: The first extant Estonian book is a bilingual German-Estonian translation of the Lutheran catechism by S. Wanradt and J. Koell dating to 1535, during the Protestant Reformation period. An Estonian grammar book to be used by priests was printed in German in 1637. The New Testament was translated into southern Estonian in 1686 (northern Estonian, 1715). The two languages were united based on northern Estonian by Anton thor Helle.

Question: What two people are responsible for the first still in existence book in the Estonian Language?
Answer: S. Wanradt and J. Koell

Question: In what year was S. Wanradt and J. Koell's book written?
Answer: 1535

Question: What type of book was it?
Answer: bilingual German-Estonian translation of the Lutheran catechism

Question: What book specifically for the use of priests was printed in Estonian?
Answer: An Estonian grammar book

Question: What year was the priests' grammar book put into print?
Answer: 1637

Question: Who wrote the last Estonian book? 
Answer: Unanswerable

Question: What book was published in Eastern Estonia in 1715?
Answer: Unanswerable

Question: What book was not used by priests in 1637?
Answer: Unanswerable

Question: Who wrote in Eastern Estonian? 
Answer: Unanswerable

Question: Who wrote the grammar book in 1637? 
Answer: Unanswerable