Mike Hales is working on a book-like plan, and need to have an equivalent to sections and chapters. Wiki provides no tools for categorization in this way (…). matrix 
What we seem to be missing is the ability to declare a wiki page as a table of contents (TOC). What could be more obvious than using the "Welcome Visitors" page and defining a kind of map in a Markdown snippet, similar to a DITA map, a technology I have been working with for almost 20 years in the field of technical communication.
A DITA map is the mechanism for aggregating topic references and defining a context for those references. It contains references to topics, maps, and other resources. page
For example the code for an MDITA:
# Remote Lighting Network - [Introduction](introduction.md) - [Alternative lighting setups](alternatives.md) - [Low power installation](low-power.md) - [High power installation](high-power.md)
Rendered as Markdown snippet:
# Remote Lighting Network - [Introduction](introduction.md) - [Alternative lighting setups](alternatives.md) - [Low power installation](low-power.md) - [High power installation](high-power.md)