I've been writing a technical book, but after Chapter 1 I realised that it would be more useful to people as a searchable online resource.
I imagine that the customer subscribes and can then search the content for solutions.
So my question is how do I protect online content and charge monthly for access to the content. Is there a service I can use, or script or...?
In practice the content will be created by H&M HTML output, so I probably only need to protect access to a directory.