Good. Font size, background color, my eyes are happy.

看有圖片的書時可一打開就自動維持最佳比例!!!非常好!!! 還有八種不同閱讀模式可選！太棒了！如果可增加目錄會更完美！If it adds contents, it would be perfect.

Works well, has several reading modes, but has no table of contents function so I cannot skip to a chapter.