Interesting selection. Aldo Leopold is well known in Wisconsin, but I had no idea he was so renown world wide. I know that limiting it to ten books imposes limits it's hard to quibble about some of these. I might have included Philosophiæ Naturalis Principia Mathematica by Newton on the list. I also with so many other potential choices about the black experience in America have selected a different book than Beloved, but that's why lists like this are fun.