[Foozle]

IMO, there are way too many styles that have differing elements. Some have the color codes as names and others as hex, for starters. Some don't even have the colors at all. Then there is the absolute abundance of block styles in general.

You would just need one single style to make your background black and the text white. Such as:

body {
background-color: black;
color: white;
}

That would apply the background and text colors to all the pages all at once as it uses the main body tag to implement that.

Then you should clean up all the styles to combine like ones together, such as:

.block_6 {
display: block;
line-height: 1.2;
text-align: left;
margin: 0;
padding: 0;
}

.block_16 {
background-color: #FFF;
color: black;
display: block;
line-height: 1.2;
text-align: left;
margin: 0;
padding: 0;
}

Notice the only difference are the color lines. You can remove that and combine those two into a single style. Just make sure to change your references throughout the book. Then just continue cleaning up the styles until it's clean with only a few styles instead of *gestures to all* all that garbage.