For numbers 7 and 8, I list simplicity and emotion-packed. Most people won't read deep, complicated books. They want material that's easy to understand and digest.
I'm not a fan of Danielle Steel, but she understands that her fans want simple, straightforward stories. Some have called her novels simplistic—and they probably are—but she tells a good story.
The other is emotion-packed. They're the stories that make readers feel they are actors in the book. When a writer figures out how to how tap into the emotions, readers buy the book.
In April 2013, first-time novelist M. L. Stedman released a book called Light Between Oceans. A book about a lighthouse in Australia in the 1920s doesn't have much to commend it; however, the reviews have been amazingly good.
Several writers have recommended it because of the emotion. One friend, Gail Smith, told me she cried a lot near the end. Last week I read the book. Guess what? Tears filled my eyes. Stedman did it right and tapped into the feeling level of readers.
And because Stedman touches the feeling level of readers, they respond by buying her book.