ENGLISH IS CONSIDERED a Germanic language, yet it has long been a marvelous hybrid. Take the word book. It comes from the Germanic word beech, because our chief linguistic ancestors wrote on the bark of that tree.
Yet a collection of books isn't called a bookery, but a library. That word comes from the Latin word liber, meaning first the bark of a tree, and then a book.
A list of related books isn't called a librography, but a bibliography. Here we find the Greek word for book, biblos (or biblion). That's where we get the word bible -- the book.