I noticed a few threads some time ago regarding this, and have had the problem myself. Purely by chance I figured out how to avoid it. I rarely visit this forum these days so apologies if this is old news and other people have posted the following already.
The text doesn't actually fade whilst reading, it's only if the page is turned
whilst the screen is in direct sunlight. For example, if a small section of the page is in sunlight and the rest is in shadow, when I turn the page, only the text that was in sunlight is feint. Now, when turning pages, I move the screen into shadow, or hold it flat against my chest, until the page has changed.
As I said, you may all know this by now, but with summer finally here (for the next few days anyway) if there's just one person who's concerned their reader is buggered it was worth posting.
Happy reading
