I think as well, if you tell someone in order to read this book, you should go read these one or two other books, they probably won’t ever read the original book.
What I mean is you can get some Japanese go puzzle books on UK or US kindle say, and you could start reading them with just recognising a couple of symbols.
But if you have to read 1-2 genki books first, you might never come back to reading that puzzle book. Not to mention learning Hiragana and Katakana can already put off the average person as well as specific kanji.
I think there is a niche to those books as I said, they are collecting nouns say in one place (in the first couple of books) and then they open up a bit assuming you’re learning more about the language than just some nouns for a go book.