Remember, this is the very first page that people will see - so they do not want
to be faced with a page of text spilling over into many paragraphs! They need to
see a concise couple of paragraphs of what the website is all about. Think to how
you perceive a website when you first visit one. However, the more text you can put
on every page, the better it works with the search engines. Mention your book and
your name as much as possible!
However - it is up to you to write whatever you want in your website.