Hi,
I like reading short simple news stories on my Kindle, for example from
NHK News Easy (feed: rsshub.app/nhk/news_web_easy).
I can download the latest articles with Calibre of course, but for the Kindle dictionary to work properly, I need to have
vertical text. Do you know, perhaps based on the discussion above about converting from epub to mobi, how I can convert the mobi book (news) so that the horizontal text gets vertical?
Thank you!