Most people don't understand why some books are more popular on Amazon than other. Well, the computers decide by a number of different things - such as "Likes"
If a person "Likes" a book on amazon it is elevated in the que of books people will want to buy.
So help a book rise to the top of its catagory by using the "Like" button to express your opinion. Also, you don't have to buy the book from amazon to "Like" a book.
We all need each other to make the world go around.