Theodor Fontane 
Effi Briest [EPUB ebook] 

Effi Briest, the classic German realist novel, follows a young woman through her life and marriage. She is an innocent when she is married to the social climbing Instetten, and longs for wordly things. When she is left alone by her husband, who is pursuing his political career, she succumbs to the flattery of another man. Her adultery has wide and tragic consequences on the rest of her life.