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PaulA
Since: Jan, 2010
neutrinobunny
Since: Dec, 1969
MissMercurial
Since: Dec, 2010

There were two books I read as a kid. This would be in the 80s. Both were ghost stories.
The first dealt with a girl, she and her sister were supposed to stay with I think their grandmother for the summer, but she got sick. So her sister stayed with an Aunt and she stayed with her Uncle, who was not a bad guy, just not someone who really liked kids, in a cottage that he was renting. Anyway there was a little boy ghost who kept appearing to her, and liked the jokes that she found in a bunch of old comics, and this evil ghost, maybe the little boy's stepfather?, who probably was responsible for the little boy's death. The uncle doesn't believe her, and then does, and they wind up fighting off the evil ghost together and become good friends.
The second book was about a girl who's mom remarried a man with his own daughter, a younger girl. The younger girl started hanging out with ghost who messed up the mom and the older girls things, and was trying to get the younger girl killed so that they could be together. I remember that the main girl really liked 'Watership Down'.