Blue Book

noun

• 1an official book listing government officials.
• British a report bound in a blue cover and issued by Parliament or the Privy Council.
• (in full Kelley Blue Book) trademark a reference book listing the prices of used cars.
• (usually blue book) an authoritative handbook, e.g., a listing of socially prominent people.

• 2 (blue book) a blank book used for written examinations in high school and college.