That's the really shit one with the actually drawn and depicted bit of kids sucking each others dicks that people threw a fit over beng in kids lbraries a few years back, right?
It has many abhorrent things, but thankfully, child sex isn't one of them; that most famous image is actually of the author and a Tinder date as adults, as it turns out, but I don't blame anyone for thinking otherwise because discerning anyone's ages in that book's godawful art style is a task and a half. I'd recommend reading through
@Inatrous's excellent
thread about the book if you want to learn more about it, but the tl;dr it still has many depictions of sexual acts and endorses tit-chopping, so belongs nowhere near kids.
On the topic of tit-chopping, here's an interesting post Gigi retweeted on her Sonic account:

Retweets can't easily be archived, so good thing Gigi also felt the need to reply to it.

(
X,
Xcancel,
archive which is useless because it doesn't show the tweet being replied to or its author, so have an
archive of the nitter.space page too)
I never noticed Fang having a different number of fingers before; that's a fascinating detail. I wonder if any artists that worked on him ever mentioned the reasoning behind it.
Regarding Game Gear Mecha Sonic, I never realised before that the hand itself is a thruster, but with the claw, I always had the impression that the claw was his off-hand rather than coming from his chest because there doesn't appear to be an opening in his chest that the claw is coming from, either in the one piece of official art I've seen or the spritework. Is there a contemporary source that shows or describes it coming from his chest?