Step 1 : Introduction to the question "Which author is widely recognized as the bestselling novelist of all time?"
...Agatha Christie is widely regarded as the bestselling novelist of all time, with an estimated two billion copies of her books sold around the globe, according to Guinness World Records. Known as the “Queen of Mystery,” Christie wrote 66 detective novels and 14 short-story collections, including famous works like Murder on the Orient Express and The Murder of Roger Ackroyd. Her extraordinary sales rival those of the Bible and the works of William Shakespeare, making Christie the most successful novelist in publishing history.
