These don't show up often on Tolkien books, but deckle-edged page blocks (also called uncut or untrimmed) were once the standard, and for a long time still used on purpose as a design choice to give a book a more antiquarian or highbrow feel.

Once lots of Amazon buyers started returning them as "defective" and leaving one-star reviews, Amazon changed how they displayed books with deckle edging, and their all-powerful algorithms started dropping them lower and lower in search results. To the point where now almost all publishers have stopped using deckle edging at all.


https://www.spearswms.com/deckle-edge-books-defence-leith/