"Book" Expressions used in English Language

• Bookworm

a person who enjoys reading.

• Hit the books

study: learn by reading books

• Don't judge a book by its cover

means you shouldn't prejudge the worth or value of something by its outward appearance alone

• To be in someone's good books

If you're in someone's good books, they are pleased with you.

• By the book

strictly according to the rules.

• To book

to make an appointment or reservation

• Read someone like a book

understand someone's thoughts and motives easily.

• Open book & Close book

someone or something easily understood or interpreted; something very clear, and
something that is not known or cannot be understood; a mystery or puzzle 

• To throw book at someone

If you throw the book at someone, you punish them as severely as possible.

• Every trick in the book

every available method of achieving what one wants.

• Oldest trick in the book

a way of tricking someone that is still effective although it has been used a lot before

• In my book

in my opinion.