I bought "The Reasoned Schemer" as physical book and searched for a way to buy it as a PDF version, but could find it nowhere (also had no problem to pay twice for the book).

The Kindle version of it does not even have fixed table cell width for the layout of the conversation.

German book website buecher.de has "The Little Learner" to preorder as ePUB with Adobe DRM. I don't know, if you can buy digital books on this site outside of Germany. Also notice, that copy-protected digital books on this website are highly unusual; most of the books are with watermark instead, if at all.

I have no clue why a book with pedagogical background and custom layout, has copy-protection and no print-quality PDF version (but instead one with poor layout).

I’m also interested in this. Unfortunately, the other schemer/typer books appear to be available for kindle… so that’s likely the best we’ll get

I didn't find one. However, amazon has a kindle version, which might not be what you're looking for!

Just to piggy back on this. The typesetting seems off kindle and other ebook platforms. Anyone seeing this?