Este libro es interesante.
English: This book is interesting.
Demonstrative pronouns in Spanish are words like 'this', 'that', and 'those' used to point to specific people or things.
Use demonstrative pronouns in Spanish to show where something or someone is in relation to you: close (este), a bit farther (ese), or far away (aquel). They also change depending on whether the noun is masculine or feminine, and singular or plural.
Este libro es interesante.
English: This book is interesting.
Esa casa es grande.
English: That house is big.
Aquellos perros son ruidosos.
English: Those dogs (over there) are noisy.
Estas manzanas están frescas.
English: These apples are fresh.