Found this on Imgur:
Very handy for those going through the books, mind you I haven’t actually had a good read of them yet, so I’m assuming they are accurate.
They also have pretty cool artwork, could be a good idea to have them cycling through as desktop backgrounds while you are studying these books. ^ _ ^
In case anyone (probably new to studying Japanese) hasn’t seen these before I’ll also include the:
As they are a similar concept.
Cheers! ^ _ ^