How do you answer Cómo se llama el libro de españold?

The answer depends on what you're trying to say. Here are some possible responses:

If you're asking for the title of a specific book:

* "Se llama [nombre del libro]." (It's called [name of the book].)

For example:

* "Se llama 'El Quijote'." (It's called "Don Quixote").

* "Se llama 'Cien años de soledad'." (It's called "One Hundred Years of Solitude").

If you're asking what books are called in Spanish:

* "Los libros se llaman 'libros' en español." (Books are called "libros" in Spanish).

If you're asking for the name of a book you're reading:

* "Estoy leyendo [nombre del libro]." (I'm reading [name of the book]).

If you're asking about the name of a book in general:

* "El nombre del libro depende de qué libro estés hablando." (The name of the book depends on which book you're talking about.)

It's important to provide context in order to give a more specific and accurate answer.