Browsers will display hanging indents if the HTML is right. E.g., something like:
Code:
<style type="text/css">
p.hangingindent
{
padding-left: 2em;
text-indent: -2em;
}
</style>
<p class="hangingindent">A paragraph with hanging indent goes here.</p>
Works in all modern browsers, as far as I know. I don't know anything about Book Designer.