A book of ruled or unruled writing-paper for accounts, memoranda, etc.(noun)
The Century Dictionary (Public Domain)
Use "blank-book" in a sentence
"Mr. Lott retired on account of ill health, and the firm became Sanford & Hayward, which it has ever since remained, and which has steadily built up a large and profitable blank-book and lithographing business."
"Napoleon, drawing the badly scrawled blank-book from his pocket."
"The young doctor went his rounds, with a small blank-book in his hand, writing down with a pencil the few and simple prescriptions that he gave."