Earlier quoted context omitted.
Where did you get the hardcopy? (I already have the paperback for "Crafting Interpreters", but I prefer to buy hardcopies if available) As far as I was aware, there are only paperbacks.
There are only paperbacks. By "hardcopy", they meant "printed". I sell print editions through Amazon KDP and IngramSpark. Amazon is the lion's share, so I designed the print edition based on the formats they offer. At the time I started working on it, KDP only supported soft covers. They added hard covers right as I was finishing the book, and I didn't want to have to go back and redo everything. I have to admit that…
I've had my eye on Crafting Interpreters for a bit now, and I don't mind paying extra for a nicer version — especially if it's going into the pockets of an independent writer.