I like to imagine that there’s actually a fairly small number of kanji you’d have to learn within the domain of crafts you have books for, but I bet it’ll feel like they referenced WaniKani’s kanji list, and packed in as many kanji not covered by WaniKani as they can.
On the “children’s picture books” side of things, we’re in the middle a detective series right now:
I’m in trouble if I ever start reading the 名探偵コナン manga series in Japanese. It’s nearly 100 volumes long, and growing. (Reading it in English, I’m up to volume 60.)
I do want to try reading some Japanese mystery novels when I’m ready, but I have a bunch of English series I need to make the time to finish reading first!