This is the 332nd most frequent Romanian word.
rusești
"Rusești" means "Russian" (plural or feminine singular, pertaining to Russia).
Here, 'rusești' describes the cultural or national origin of the books, attributing them as Russian.
Îmi place să citesc cărți rusești.
I enjoy reading Russian books.
In this sentence, 'rusești' is used to attribute the origin of the movies as being from Russia.
Filmele rusești sunt foarte populare în Europa de Est.
Russian movies are very popular in Eastern Europe.
Here, 'rusești' describes certain traditional elements as being characteristic of Russian cuisine or culture.