Employee Handbook Solution

I’m in the process of building an “intranet” type of site that will be just for the employees of our organization.

I’m trying to solve the problem of what is the best way to migrate and structure our Employee Handbook in a way that is easy to manage and scale as needed.

What I’ve tried: Various “FAQ Manager” types of plugins, various “Wiki” types of plugins, and a few “Custom Post Type” of plugins all with only limited success. I’m beginning to think that I might try and embed a wordpress site within the wordpress site.

I wish there was some sort of “book” publishing kind of plugin where you can publish “chapters” and where the toc generates itself dynamically based on custom categories or post types.

Does anybody have any thoughts/suggestions?

Thanks for the help!
NOCCA