The style of the front page text (which just displays the title of the book) can be altered with the following CSS (found in Booktype ONLY CSS panel):
h1.frontpage{
page-break-after:always;
margin-top:70%;
font-size: 20pt;
text-align: center;
page-break-before: avoid;
font-weight: normal;
}
You can add additional text such as a byline with the following:
h1.frontpage:after
{
content:"by Joe Smog";
}