Last Sunday,Ken and I took Mocky to a bookstore. We wanted to buy a book for him.ken found an animal storybook,but Mocky didn't like it.I found a comic book,but Mocky didn't like it either.Then,ken found a science book and it had many colorful pictures in it.We all liked it,but we couldn't buy it because it was the most expensive book in the store. Finally,Mocky came back with an e-book