When I was a child I read and loved Robert Heinlein’s Podkayne of Mars, so when my son was old enough, I read it to him also. I had somehow acquired a nice edition of the book, one with an interpretive essay in the end. So, when I went to read the book to my son, I read the essay, and discovered that the book wasn’t at all what I remembered when I read it as a child.
What I had read as a child was simply entertainment. A great story of a girl who goes on an adventure with interplanetary repercussions. What the essay spoke of was Heinlein’s rejection of woman’s liberation.