The word "book" is a noun that we use to talk about a large collection of written work. A book has a cover, and inside the book are pages made of paper. Books are usually published by companies. The person who writes a book is called an author.
I read a great book last week. (past tense)
How many books do you read every year? (present tense)
This book is now available at the bookstore.
You can also use the word "book" as a verb. In this case, it means to make a reservation.
Amy booked a flight from Miami to Chicago. She and her family are leaving next week.
Amy also booked a reservation online for her family of four at the Palmer House.
Have you ever booked a reservation online? it’s very easy to do.
I need to book a reservation for a party of twenty people at a restaurant.
As a verb, the word "book" is also used when doing bookkeeping work for a business:
Their company booked a profit for the first time last year.
The sales of some shares of stock will be booked at a loss of $10,000.
There are a few other uses for the word "book."
If information is on the books, it’s printed and available to read.
If you’rebooking, you’re traveling fast or doing something very quickly. (Look at him go! He’s really booking!)
A bookie is a person who manages gambling bets, usually illegally.