The top 10 most popular ebooks by word count are all ebooks: The Martian, The Princess Bride, Twilight Saga: Eclipse, A Wrinkle in Time, Gravity, Star Trek: Discovery, Catch Me If You Can, Mulan and The Little Mermaid.
The Princess Bride was the most popular by word-count, followed by The Hobbit: An Unexpected Journey and Gotham.
The top 10 ebooks are not the most common, however.
According to Amazon.com, the top 20 most popular books on the site are the following: 12.
The Princess B.C. by Lois Lowry.
The Wizard of Oz by Charles Dickens.
A Tale of Two Cities by Jane Austen.
Lord of the Rings: The Return of the King by J.R.
Fables by Lewis Carroll.
Hocus Pocus by Robert Louis Stevenson.
Alice in Wonderland by Lewis Carrol.
Twinkle in the Shining by Stephen King.