Bookish Math

Statistical tests are unraveling knotty literary mysteries

AUTHOR SWITCH. The modern cover of The Royal Book of Oz lists Ruth Plumly Thompson, not L. Frank Baum, as the author. A new mathematical analysis supports that attribution. Dover Publications
DISTINCT STYLES. Points representing texts by L. Frank Baum (black dots) are far separated from those of texts by Ruth Plumly Thompson (open circles).