The most dramatic example of revision that I’m aware of is from Walt Whitman’s Leaves of Grass.
”Whitman published the first edition of Leaves of Grass in 1855. He produced varied editions of the work ending with the ninth, or “deathbed” edition, in 1891–1892. What began as a slim book of 12 poems was by the end of his life a thick compendium of almost 400. Whitman regarded each version of Leaves as its own distinct book and continuously altered the contents. He added new poems, named or renamed old ones, and, until 1881, repeatedly regrouped them. He developed the typography, appended annexes, reworded lines, and changed punctuation, making each edition unique.”
https://www.loc.gov/exhibits/whitman/leavesofgrass.html
Library of America publishes a volume which includes both the initial 1855 and final 1892 versions.
It depends on how the hardback is made. There are a variety of binding methods used now, which may look similar at first glance, but are very different underneath. Actually the same is true of paperbacks as well.