Mine was Jane-Emily by Patricia Clapp, about a girl who loses her parents and goes with her very young aunt to her grandmother's house, and the ghost of a child who haunts her there. I still have my copy -- that old Scholastic slightly bigger paperback size (I bought at school at the book fair). The cover's long gone, but the pages are all intact. I'm going to read it with Sara soon.

I remember that book! There were twins, and another brother a little older, and they had a treasure map on an island?

Yes! I think one was a cousin. And there was some story about how a great-grandparent had gone off to war (the Civil War!) and left a note/treasure map for his kids, and the great-grandmom washed it, so no one ever found the treasures....

What's interesting is there was a sequel, which I didn't know about until maybe college or later. My dad could've just given me that! :)

I always liked the Richard Peck books. There were two books that involved ghosts; the second one had a girl who was a medium seeing the dead from the Titanic, IIRC. I'll have to look that one up for its title--it was really excellent!

Sideways Stories from Wayside School. The Great Brain. Matilda. Anastasia Krupnik. Nate the Great. No Flying in the House. Mrs. Frisby and the Rats of NIMH. I guess she's still a little young for From the Mixed-Up Files of Mrs. Basil E. Frankweiler.

Oh, that's Ghosts I Have Been, I think, Kathy! I loved that. Richard Peck and John Neufeld were huge staples for me.

I'm bookmarking all of these because they're awesome.

Harriet the Spy Where the Sidewalk Ends Nancy Drew(although I might have been a little older for those...)

Is she too young for Edward Eager, Sox? Because I really enjoyed them, and I think if she likes Narnia, she'll like those, too.

Ghosts I Have Been

Yes! Such a good book. It was spun off from The Ghost Belonged to Me, which is also excellent.

Elizabeth Enright! Gone-Away Lake! The Melanies! The Four Story Mistake!

Though I'm not sure of the proper age group on those.