The icon that shows for Compendium of Middle Earth V is wrong. It shows as "IV" instead. It's a bit confusing and needs to be corrected because it's a bug. Some crafters may look at the icon and believe that they only need volume IV and waste gold, marks and medallions buying the wrong compendium. That nearly happened to me, but I noticed the error before it was too late. It needs to be corrected as a matter of urgency.
I've reported it as a bug, before anyone comments.