Add another catagory in Bookstore

I’d like to see a catagory of "Documentaries" added to the Bookstore. I can’t see where a book like that would fit into any of the existing catagories. As it is now I see books I consider documentaries in "Fine Art Photography", "Portfolios", "Travel", "History",etc.

Also, does Blurb move books they consider in the wrong catagory or is it entirely up to the author?