I was reading a science fiction novel on my Kobo a few weeks ago, and the start of each new chapter was denoted by a solid black rectangle. A few chapters into the book, I noticed there seemed to be some kind of text inside the rectangle. Thinking I'd found a hidden message or an easter egg, I spent a few minutes trying to see what it said...then, flipping between the previous page and the page with the chapter rectangle, I realized I was seeing the ghosting from the text on the previous page
