This is the 561st most frequent Latvian word.
pēdējās
"Last" or "final" (feminine, plural).
In this sentence, 'pēdējās' is used as an adjective describing the noun 'grāmatas' (books), referring to the latest or last items in a sequence.
Es lasīju pēdējās grāmatas, kuras biju iegādājies.
I read the last books that I had purchased.
Here, 'pēdējās' describes 'dienās' (days) and implies a specific recent timeframe before the present moment.
Pēdējās dienās ir bijis ļoti auksts.
It has been very cold in the last few days.
In this example, 'pēdējās' modifies 'izrādēs' (performances), indicating the concluding events in a chronological series.