This is the 5165th most frequent Polish word.
przygotowana
"Przygotowana" means "prepared" in English.
Here, 'przygotowana' describes the state of the book as being prepared for a specific purpose (publication), and it is used in its adjectival form to complement the subject (książka).
Książka została przygotowana do publikacji przez wydawcę.
The book has been prepared for publication by the publisher.
In this sentence, 'przygotowana' is used to indicate readiness, here as the female first-person singular past tense predicate, describing the state of the speaker.
Byłam dobrze przygotowana do egzaminu.
I was well prepared for the exam.
Again, 'przygotowana' reflects the action completed by the album towards readiness, emphasizing the care in the preparation process.