In 1861, Johanna Andreae of Frankfurt published a children's book about a family of cats: Mahrchen von der Katzenfamilie.
She's my great, great, great, great grandmother. One of them, anyway. When I was a kid, my aunt gave me an english translation of the book. I promptly lost it. All I have now is the incomprehensible german version and an image of the cover.
Very cool nonetheless.
The book is listed on Amazon, although none are currently available, and it's likely to remain that way.
Johanna is not the earliest writer in the family. There's another who published a book in 1619.
How far we've fallen. I write comics, which rot the brain and corrupt youth, or so I'm told.