David Powell

Retain Author allows you to force your “next” and “previous” blog posts to stay within the same category and the same author.

Retain Author

Prevent mixing authors in your next and previous post links.

scribu

versusbassz

When displaying a single post, you might want to show links to the previous and next posts in the same category.
That’s fine; WordPress let’s you do this with <code>previous_post_link()</code> and <code>next_post_link()</code>.
But what if that post is in multiple categories?
What if the user came to that post from a tag page or from an author page? Wouldn’t it make more sense to display previous / next posts from that particular set?
Well, you can do this with a similar pair of functions, provided by this plugin: <code>previous_post_smart()</code> and <code>next_post_smart()</code>.
Here’s how it works:
Whenever a visitor goes to an archive page (category, tag, date, author, search etc.), the plugin notes which archive it is in a browser cookie.
Then, if the visitor goes to a single post from that archive page, the plugin generates the prev / next links based on the information in the cookie.
Links: <a href="http://scribu.net/wordpress/smarter-navigation" rel="nofollow ugc">Plugin News</a> | <a href="http://scribu.net" rel="nofollow ugc">Author’s Site</a>

Smarter Navigation

I have been looking into code this functionality myself but have been not able to make it work properly than i came across this plugin and it worked liked a charm on just installing it.



Worked like a charm

Generates more specific previous / next post links based on referrer.

Retain Author vs Smarter Navigation