What is the second most popular book ever?

There is no definitive answer to this question as it depends on the criteria used to measure popularity. However, some of the most popular books ever written, based on various metrics such as sales figures and cultural impact, include:

- The Bible

- The Quran

- Don Quixote

- A Tale of Two Cities

- The Lord of the Rings

- The Little Prince

- One Hundred Years of Solitude

- The Diary of Anne Frank

- To Kill a Mockingbird

- The Catcher in the Rye

It's worth noting that popularity can be subjective and can vary over time and across different regions and cultures.