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Highlight unread

Hightlights unread books (all kinds, including merchant advertisements) and unlearned data disks.
Adding this mod is safe, removing it will corrupt all affected books/data disks (actually is safe too after spring molting, just choose 'Yes' to reading error log).
Use `revealfresh` wish on existing saves to update already existing books/disks in the current zone, including your own inventory.
You can select in options which books category should be highlighted.