Thank you so much for this plugin. I had been searching for a way to page through the posts alphabetically for a while now.
My ultimate goal is to have a "« BACK | NEXT »" nav on all single page posts within a certain category. I tried using the return => 'href' parameter to return just the url, but that returned nothing at all. in fact, none of the return parameters i tried worked. Can you tell me how to get the "back" and "next" text displayed on screen rather than the post title? Here is what I am currently running with:
<a href="<?php previous_post_link_plus( array( 'order_by' => 'post_title','in_same_cat' => true ,'return' => 'href' ) ); ?>" style="color: #000;">« BACK</a> | <a href="<?php next_post_link_plus( array( 'order_by' => 'post_title','in_same_cat' => true ,'return' => 'href' ) ); ?>">NEXT »</a>