The text contrast is too high

[sharon-xa]

You have a dark background and a very bright text color, I'm gonna lose my eyes if keep reading the book using this website.

I've changed the color using the dev tools and it's looking a lot calmer and more readable.

[scottstensland]

Many folks me included prefer a dark theme however your choice of practically solid black background makes my eyes zonkers ... at a minimum please give the book some toggle on color scheme