Text in my Book/Newspaper pages is blurry in the BookReader. How can I fix that?

While you might suspect it's an image quality problem, if you check the JP2 images of your pages you will likely find that they are decent quality. Instead, you need to change compression level in your BookReader configuration.

Go to Islandora -> Islandora Viewers to change the BookReader settings. Set the Compression Level at 5 (instead of the default 4). Your text should render more nicely. If it’s still blurry, set it another notch higher and see how it looks.