[AlanHK]

You can put something in the CSS to make everything else disappear, e.g.

e.g. add color:white; or font-size:0; to your p tag.

Now all p tags will be invisible, leaving you with the untagged text (as well as h1, etc. tags and others, you can white them out too if you have a lot). So quickly scan through the book to find them.