Setup a series of posts using a new taxonomy. Posts within a series will show an info box above the content with links to other posts in the series.
WP Post Series is a lightweight plugin for making a series of posts and showing information about the series on the post page. The information box is prepended to the post content, and it can work with any theme (given a bit of CSS styling) - no setup required.
You can contribute code and localizations to this plugin via GitHub: https://github.com/mikejolley/wp-post-series
Use the WordPress.org forums for community support - I cannot offer support directly for free. If you spot a bug, you can of course log it on Github instead where I can act upon it more efficiently.
If you want help with a customisation, hire a developer!