For books, the 1st edition’s contents VS 2nd/subsequent edition’s can vary a lot.
For some books, it can mean from mere spelling errors to addition/omission of a few paragraphs/pages/chapters. Due to some external issues, some words can also be rephrased/replaced.
So it’s different content/feel altogether. In 1st edition, we can see the author’s original intentions thru these differences.
Not just a tiny stamp like in cards.