Book 9 of Crystal Hunters was released today and until March 14th book 1,2,3 and 9 are available for free in (learners)Japanese, English and Natural Japanese. (and book 1 is always free)
I know that these books are somewhat controversial as they are not native content and such, but I think they are a great place to start for anyone who is not ready yet for native material, specifically manga. I would suggest reading the “Japanese Guide in English” for each volume before tackling the actual book, as it covers all of the grammar needed to read the associated volume (see link below).
I have made a vocab deck for the first and second volumes and can publish the rest if people are interested.
Links to their guides and at the bottom of the page the links for the free chapter 1 in Japanese, Natural Japanese, and English:
And here are the amazon links to the free volumes in Japanese
https://www.amazon.com/dp/B08N4DHYT6
Natural Japanese
https://www.amazon.com/dp/B08N4W6YZ2
and English
https://www.amazon.com/dp/B08JCTKQHL
I love the series because it was the only thing I could read at the beginning that was even remotely interesting, and am planning on reading through all again, this time in the Natural Japanese.