Dashboard the book in the corner

[Charles]

In the upper right corner of my dashboard one of my books is featured. Apparently this is determined by "popularity" and I can't change it? How is popularity determined?

[Paula]

Number of shelvings of the book by reviewers, if I remember correctly

[K.A.]

That doesn't work; the one there for me is my second-most shelved.

[Nenia]

I think it's the book that has gotten the most activity that particular month.