David’s answer to “I have all of you books on my Kindle app. But I want them for my library where the hell do I buy th…” > Likes and Comments

You will find that Book Depository has most if not all of them.
I know this because I did the same thing Jonathan; the books are just so damn amazing I needed physical copies.

Are there any hard covers or are they all paperback? I'd love to collect them.