This is the 512th most frequent Russian word.
эти
"Эти" means "these" in English.
In this sentence, 'эти' means 'these' and is used as a demonstrative pronoun modifying the plural noun 'книги' (books).
Эти книги на полке.
These books are on the shelf.
Here, 'эти' again translates to 'these' and points out specific people in the plural form.
Эти люди говорили со мной вчера.
These people talked to me yesterday.
In this example, 'эти' is used to specify particular items (toys) and connects them to a possessive relationship.