Honestly though if she's reading on her own she's probably old enough for you to read it verbatim and explain the racist concepts and why they aren't acceptable/would have been put in the book. She's going to run into these concepts at school, better that she understands what is/isn't acceptable, and why, when she does. Of course, bed time, while reading a chapter of the book, may not be the most convenient time for that.
That's pretty much where I am. We always try to answer her honestly and explain things, but I don't really want to get into a discussion about race and the evolution of language over the last half century while she's falling asleep.
I do point out frequently that CS Lewis was closeted gay racist and tell her that all Christians are that way, of course. I mean there's always time for SOME lessons.
To make a long story short, I don't take any responsibility for anything I post here. It's not news, it's not truth, it's not serious. It's parody. It's satire. It's bitter. It's angsty. Your mother's a whore. You like to jack off dogs. That's right, you heard me. You like to grab that dog by the bone and rub it like a ski pole. Your dad? Gay. Your priest? Straight. @#%^ off and let me post. It's not true, it's all in good fun. Now go away.