Author, Author ...

I took today's puzzle very appropriately, it turns out, to breakfast (at Starbuck's) to solve. I even had cereal -- albeit oatmeal, rather than the cold-cereal subject of the puzzle theme.

But 'twas a double-themed puzzle, as not one, not two, not three, but five fiction authors and one poet popped [ahem] up in the fill. One pair of authors shared a clue (as opposed to an entry), and a pair of sisters -- both writers -- shared an entry.

The choice of authors had nothing to do with the theme, that I'm aware of, but it was a nice extra bonus hunt for a lazy Monday holiday.