When I search for this using “Eldertide Torus, All Items”, I only get actual furnishing items (already crafted), not any furnishing plans. Note that there is only 1 possible type of item returned from the search, not two, so it’s not that there just weren’t any plans for sale in that trader.
Also, trying to search for the new Scrivener’s Hall furnishing item books I have to search all furnishings as there is no category that defines books. There may be multiple pages of items returned.
Khajiit Stamblade
Dark Elf Magsorc
Redguard Stamina Dragonknight
Orc Stamplar PVP
Breton Magsorc PVP
PS5 NA