I liked Secret Garden but LIttle Princess better (I was given a boxed set with those in it) I read Wizard of Oz and the 2nd book (name escapes me at the moment) but couldn't get into that series. Apparently I was particular about how much "fantasy" I wanted to read and how it was manifested
I happened to read a bunch of books about possessed dolls of various sorts and cannot remember anything about those anymore (would love to) and had another couple favorite books in the children's section of the library - one was called 11! Time for Marriage Farhut (about an Indian? girl with a pet tiger who didn't want to be married) and another about a slave during the Salem witch trials called Tituba...Not sure if there was more in the title or not.
The problem with being a voracious reader and using the library is that it's very difficult to remember and/or find all the books I loved as a child

What about Trixie Belden - have you heard of those? My mom read them, they were of an "earlier" generation - I think my stepgrandmother had a set and I started reading them on vacation once - once I start a series I like, I have to finish it..