This is the 11901st most frequent Polish word.
książka
Book.
In this case, 'książka' refers to an 'address book,' a collection of contact information.
Mogę wpisać twoje imię w książkę adresową.
I can write your name in the address book.
Here, 'książka' means 'book' referring to a literal object used for reading.
Ta książka jest bardzo ciekawa.
This book is very interesting.
In this example, 'książka' again literally means 'book,' showing ownership and place.