[KS] I think it needs some extracts and perhaps some sample illustrations, and maybe you should say which age range each book is aimed at. And it also desperately needs a professional portrait picture of you, the author. At first glance (and that's all you get from any web-user visiting your pages for the first time - I think the patience limit is less than 7 seconds, isn't it?) there's not enough information there to make the books appealing and make me want to buy them.
You need to lighten up the background, as the text is hard to read, and change the font to being bigger and more interesting, as the current font is a bit dull. May I suggest Verdana or maybe even Arial, although as it's for children's books, maybe Comic Sans would be more appropriate. Also rethink the logo as it doesn't really jump out at you. I'll try and have a go later and if it looks good I'll upload it onto the web and post it here for you.