This is the 892nd most frequent Croatian word.
istog
The Croatian word "istog" means "of the east" or "eastern."
In this sentence, 'istog' is the genitive singular masculine form of 'isti' (same), used to specify the exact moment remembered.
Sjećam se istog trenutka kada sam ga prvi put vidio.
I remember the same moment when I saw him for the first time.
Here, 'istog' refers to agreement with 'žanra' (genre), showing that the book belongs to an identical category as another.
Čitao sam knjigu iz istog žanra kao i prošla.
I read a book from the same genre as the last one.
In this example, 'istog' is used with 'značaja' (importance) to convey that the meeting held equivalent significance to another.