An exhaustive look at the historical record.
Those of you who expect fairy tales -- or even chivalric romance -- will be surprised. The documents are actually pretty much all "natural history" -- of the era, which obviously was dominated by hearsay and travelers tales. Also comparisions to the ki-rin and other one-horned beasts and what connections there might be. The sales of alicorn (unicorn horn appears to be a bit much). Some elements recognizable even in modern fantasy.
Moved around a lot. From India to the Mountains of the Moon in Ethiopa, to the Americas, to South Africa.
Gotta admire a writer who admires the unicorn's graceful ankle bone.
A bit academic.