This is such a good question! (Might have to write a post about it!)
Some of the greats never thought about their readers, in truth. Maurice Sendak said he never gave them a thought. Then there are those all about the sales and not the work. (Da Vinci Code dude…) And then there’s the beauty of Treasure Island, which Robert Louis Stevenson wrote specifically for his beloved step-son… maybe there’s something to that, I think, because almost two hundred years later the book is one of the best read-aloud, and reads, ever. Is there one person you can imagine writing for?