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"Interesantes" is a form of "interesante", an adjective which is often translated as "interesting". "Libros" is a form of "libro", a noun which is often translated as "book". Learn more about the difference between "interesantes" and "libros" below.
interesante(
een
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teh
-
reh
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sahn
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teh
)An adjective is a word that describes a noun (e.g., the big dog).
1. (intriguing)
a. interesting
Andrés está leyendo un libro muy interesante sobre la lexicografía.Andrew is reading a very interesting book about lexicography.
el libro(
lee
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broh
)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.