Categories appearing on pages

I am building a website rather than a blog, so start with a bunch of "static" pages. However, I do want a menu option to that links to a more traditional "blog"

I want to be able to have posts automatically feed into a set page - say blog, so I have created a page called blog.... but without me doing anything the home page appears!

I have been trying to categorise posts and getting that post to appear on a set page so I might have a page on e-books and all posts marked with the category e-book gets listed, ideally with a preview/read more link to the full post..... but to no avail!

Please help

see http://www.thewordmaid.com

Ta

Robin