Replaces the first letter of the post on a per-series basis with the font/color/text decoration of your choice. Requires the Organize Series plugin.
The first letter of a post is modified as specified in the corresponding CSS class. This works even in posts that are split up into pages (e.g. Wp-PageNavi). The options page allows you to specify the CSS class name for each series. You add the CSS class definition(s) to your theme's stylesheet.
NOTE: Maximum 10 series.
Tested with Organize Series 2.4.6 and WP-PageNavi 2.8.5.