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"El que" is a phrase which is often translated as "the one that", and "libro" is a noun which is often translated as "book". Learn more about the difference between "el que" and "libro" below.
el que
A phrase is a group of words commonly used together (e.g., once upon a time).
a. the one that
¿Cuál es tu carro? - El que está estacionado junto al árbol.Which one is your car? - The one that is parked by the tree.
b. whichever
¿Qué camino elijo? - El que elijas te llevará a la aventura.What path should I choose? - Whichever you choose will take you on an adventure.
el libro()
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
a. book
Leer un libro es perderse en otro mundo.To read a book is to get lost in another world.
Esperamos una hora para que el autor firmara nuestra copia de su libro.We waited an hour for the author to sign our copy of his book.