# The reaction force of a normal force

Assuming I have a book on a table. First, there is gravitational force acting on the book, which causes the book to also exert the same amount of force on the Earth. Now, the table will also exert a normal force on the book to counteract the gravitational force (weight of the book). However, there must be a reaction force to the normal force isn't it? If so, how can the book be possibly staying on the table if it exerts another reaction force on the table?