Can anyone recommend e-books, preferably in English or Japanese, teaching Shanghainese? One that also, preferably, provides the Chinese characters, not just some romanisations. I have encountered this e-book here on the Net:
https://www.amazon.co.jp/%E8%AA%9E%E5%A ... 4384051867
unfortunately am yet to find a version of the book that is readily available to download.
If you're wondering why I choose to study Shanghainese (and not, say, Mandarin) I can say that it is the phonologically easiest Sinitic language to learn (at least for me), having only two distinctive tones to look out for.