Boundaries: How the Mason-Dixon Line Settled a Family Feud and Divided a Nation by Sally M. Walker
I gave it 40 pages and had to stop because other books were calling me. I love Sally Walker (she's an awesome booktalker and Illinois author), but I just can't read this unless I'm doing a report on the Mason-Dixon line. It would be a good addition to school nonfiction shelves and really gets into STEM topics, too.
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