Struggling to remember a horror book my brother had in the 90's

[grimshire]

I'm trying to remember the name of this horror book my brother had in the 90's, i can vaguely remember the plot and the cover and nothing else. I specifically remember the cover had a red boarder, with hand drawn art with a blue demon kid with horns in a hoodie holding a kife/dagger behind his back while looking sinister at the reader while sitting on a log or branch and it had another boy i think they were at a campfire, one plot point i remember was the boy fell off a structure and was impaled with a spike or poll sticking from the ground and i remember it saying something about his internal organs falling out, but i also recall the boy had a friend who was a girl. I don't know why i'm thinking font in the title was like goosebumps but this was from what i remember it was way to dark and graphic for that series. Because my brother passed away in the 90's with leukemia i always wanted to read that book but i was too young at the time and wasn't allowed but i remember having a sneak peak at it.