ua behavior test a8.1.0.4 is problematic

[llemeurfr]

"id": "a8.1.04",
"description": "If the audiobook contains a primary entry page, it is displayed first (or the content within is presented first)",
"actions": "Primary Entry Page is displayed first"

The behavior presented here makes no sense if the audiobook is packaged. UA developers may prefer displaying immediately the cover and audio controls, plus something giving access to the PEP at will, like an info page. And I bet that the few PEP created will be so bizarre or ugly that developers will not create a big button.

This test should therefore be edited as
"If the user agent gains access to the audiobook via its primary entry page, the content of this primary entry page is displayed first, before the user can listen to the audiobook"

or much less intrusive and applicable to LPF files also (I would prefer in fact)
"If the audiobook contains a primary entry page, the user agent has provided a means to display it to the user".