I loved /A Wrinkle in Time/ when I was a kid, but I picked it up again maybe five years ago and had the reaction of "maybe now I understand why it got rejected by so many publisher" (I was at a library where I didn't have borrowing privileges, and I didn't get that far into it).

I did listen to the audiobook of /A Wind in the Door/ about the same time and found it to be still good, though.