I didn't leave books out for her if I didn't want her to have the option to read them. She cared more about cruelty than violence at that time, and that hasn't changed much. She's had very little physical risk in her life and I think violence is not as real for her as cruelty. Still, she wasn't a big fan of detailed descriptions of violence or its aftermath.
We also talked about the books and I tried to give her a summary in advance, including the parts that I thought she might not handle well. She did skip some books based on my summaries.