This is the 7404th most frequent Dutch word.
boekenreeks
A series of books.
Here, 'boekenreeks' is used to refer to a series of books written by an author, implying a collection of related books.
De boekenreeks van deze auteur is wereldwijd beroemd.
The book series by this author is famous worldwide.
In this sentence, 'boekenreeks' is mentioned as a complete set of books that someone read.
Ik heb de hele boekenreeks in één maand gelezen.
I read the entire book series in one month.
Here, 'boekenreeks' specifies a set of books intended for a specific audience, namely children.