Goose Bumps:How to kill a monster

Gretchen and her step brother Clark who believes what he reads in comic books have to go to their smelly boring grandparent's house which is in the spooky,weird,smelly and hot SWAMP because their parents are in trouble with their business so they are going to athlantha(not sure if the name is correct) and they can't bring the children and the dog. There's no TV, car or AC. The house stinks sour and dusty and it's huge. Not much windows so you won't notice whether it's night or morning. There are cockcrches everywhere and there's one room the grandparents are not allowing them to go in...there's a swamp monster! Grechen and Clark were doing hide and seek and Grechen thought Clark hid in the locked room. As she says cheater in her mind she sees the furry green swamp monster. when they were running to tell the grandparents, they were running away with their car! The doors and windows were locked with two letters left from both grandparents stuck on the refriger's side. How to defeat it and warnings....But after they kill the monster with the advices in the first letter they break the window and go thoriugh the swamp to phone their parents. But when they read the second letter...they gasp with terror. The letter said...'even if you kill the monster...Never go in the swamp.Dozens of the monster's siblings are waiting for their brother...'

This was the end of the story. I'm so puzzled what happend next to the children..but this is the end so....Bye!(READ GOOSBUMPS!!BORROW IT FROM GIANG!!)