This is the 2754th most frequent Japanese word.
著書
Authored book.
著書 here means 'book,' referring to a notable work written by someone.
この著書は世界的に知られています。
This book is internationally known.
著書 in this context denotes a scholarly or professional work authored by an individual.
彼の著書は歴史的な研究に基づいています。
His book is based on historical research.
著書 is used here to represent the books authored by the referenced individual.