One of the way that to relate the reader intested topic within your blog is using the Related Posts plugin.
For related posts features, I try with “wordpress related post” before. It just a very simple and light plugin but you have not much control over it, it is more then enough for the wordpress beginner. You can set the Related post title, or no related post found title, the number of related post to display and some simple setting.
After some time of testing, I change to another plugin call “Yet Another Related Posts Plugin“. It provide more functionality and you have more control over it. You may exclude the category, tags, and also control how you want the related post detail to by display in your blog post.
Other related post plugin:
- Yet Another Related Posts Plugin (YARPP), by mitcho
- Similar Posts, by Rob Marsh.
- WordPress Related Posts, by Denis.
- Wasabi Related entries plug-in .