I once wrote a book called How to Keep an Idiot Entertained for Hours. It went like this: To keep an idiot entertained for hours, read the next sentence. To keep an idiot entertained for hours, read the previous sentence." It didn't sell very well.
I thought with the short attention span of people these days it may have been too long, so I rewrote it. The 2nd edition went: "To keep an idiot busy for hours, re-read this sentence."
It's doing pretty good. I have a deal for the sequel. The 3rd edition is going to go: "Re-read this line."
Trouble is, I'm not as sharp as I used to be, so it's become my favorite book to curl up with on a rainy day. It absorbs me for hours.