A Bookcase is a furniture item and counts as a flat surface for NPC rooms.
Someone showed me that bookcase suggestion post 3 hours ago and I. .. Anything involving inventory management in Terraria is a godsend.
Pink Dungeon BookcaseInformation Type furniture Sub type crafting station Placeable Yes Max stack 99 Rarity tier 0 Sell 60 The Pink Dungeon Bookcase is one .