expression, noun
one's desk-side book; a book kept at hand for frequent reference
Refers to a personally valued book kept close for regular consultation, guidance, or inspiration. Often used in literary or reflective contexts.
彼にとって聖書は座右の書だ。
For him, the Bible is his desk-side book.
この辞書は私の座右の書です。
This dictionary is my constant companion.