A book is usually made of paper and includes stories, facts, or pictures. People use books to learn or for entertainment.
I read a book about animals.
She has many books in her bag.
To book something means to make a reservation for it in advance, such as a hotel, ticket, or table at a restaurant.
I want to book a table for dinner.
We need to book our flight soon.
In this sense, 'book' refers to a record-keeping document that details transactions or events, often used in business or administration.
The book contains all the voters' names.
Keep a book of company accounts.
