I think it is excusable in this case, because there is a lot of leading space between the lines and most paragraphs are short.

Have you tried reading a few pages? It grotesque really distracting in this particular case or is it just your general experience?

If you're not making any money from selling your books, why not make them available for free? They will reach a much wider audience.

(1) People do not value free stuff.

(2) To some people (like me), a few 100 EUR per month can make a huge difference.

I'll echo GeoffKnauth, I'm glad to have paid you for several of your books. I'm looking forward to starting the introduction to Klong book, as I find array languages fascinating but there's a regrettable lack of beginner materials for many.

Incidentally, the 6x9 PDF size is great on a Kindle Oasis, the print is a bit small but it works. This is in contrast to most other PDF ebooks, which I would have great difficulty reading on the Kindle, so thank you also for that!

I do value free stuff, but I also value you as an author. Happy to pay for my PDFs of your work.

Good to hear, thank you!

And I agree, the generalization above was too broad -- I also value free stuff!

But as a generalization I think it holds true. On average, free stuff is not valued very highly by the general public. Or rather, a person selected at random will not perceive much of any value is something given away for free.

Bought a copy, into chapter 2,good read so far, font is readable too as far as I can tell