Support books marked "experimental"

[marisademeglio]

No description provided.

[marisademeglio]

@GeorgeKerscher @ways2read here is the issue for experimental books. You mentioned on the call how they could live on the site but not be part of the test result tables (i.e. not ingested). The current status is that they don't live anywhere on the site.

[GeorgeKerscher]

We want distributors to ingest these titles for testing. Many titles can be sideloaded on various Reading Systems for testing.

Fundamental titles should be clearly identified, and note the results are published.
Advanced titles show functionality that when broadly supported will move into the fundamental titles. Results are published.
experimental titles show functionality that are of high interest, but the results are not published. Functionality that becomes clear will move into the advanced titles.