Blacklight needs to get Book Covers at least as well as Jessie got it working for Stanford's VuFind Searchworks.

The covers need to be fetched from the blacklight user's box (or cached locally) so we don't request all covers from one IP.

Blacklight currently looks in a lot of places, sequentially, for the cover. This meant new fetches were very very slow.

Cover provider(s) needs to be configurable for installations, too.

Stanford has been doing this with javascript (AJAX) for their VuFind installation. Jessie is the knowledge fount.