I have heard some say this book The Epistle to the Romans by Karl Barth is not well transferred over in logos and that the picture is grainy.
Those people probably don't use Logos much. Not having worked through it, I might have missed finer issues someplace. But how well a book is working in Logos is mostly depending on which indexes are present. For a commentary, the bible index is essential. There's absolutely no issue with that, we have bible milestones where they should be, and on a verse-to verse detail level to precisely access the content Barth wrote in all of Logos' functionality. We also have a page index for those who care or such. Verses cited by Barth are linked - this all makes the difference between Logos and say a kindle edition.
The overall look of it (paragraphs, bolding of relevant phrases, italics etc) all make it a pleasure to read and study. There are not many footnotes - but unless those people can show such footnotes in the printed edition, there's no indication that their lack is due to the transfer into Logos. After all, Barth consciously wrote an original work, not a commentary on other commentaries.
The cover picture is something I personally don't see much of - the tabs thumbnail in Logos is very small, and I prefer my library in details view. So I wouldn't care. But your sources are wrong with this irrelevant claim as well - to the best of my ability to look at it in a monstrously enlarged view, it is less grainy than the other cover pictures of Barth's works I own. In fact, pasting it here, this picture is the only one where I can clearly read the title (due to the large contrast) - but who would look for the graphic details of a cover picture when it is only seven words of text overlaying a cross-shape on a dark background?
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