I didn’t read many of them, but my brother had like forty of them. I remember reading one where a kid gets impregnated by aliens and lays and egg at the end of one, lol.
I was never particularly into Goosebumps; Animorphs and the Xanth books were my go-to reading choice in that age range. That said, I imagine I would have quite enjoyed that weird alien impregnation story. :)
I had read a little bit of that series but never really got into it. The only thing I remember about it is the intro song from the TV adaptation.
This one’s my absolute favourite. I must have read it a thousand times. You’re on a field trip and turn into this creature when you wander off and eat some weird fruit.
I was in college when they started coming out. I have never read any of them.