Anna Karenina by Leo Tolstoy from A to Z Classics All A to Z Classics have been formatted for ereaders and devices and include a bonus link to the free audio book. "All happy families are alike; each unhappy family is unhappy in its own way." - Leo Tolstoy, Anna Karenina Anna Karenina is the story of an unhappy marriage, a doomed affair, and has been called the greatest novel ever written.