Simplify the following text for a Grade 6 native English-speaking person.
Original: The book has sold over 1.2 million copies in the subsequent four years , appearing on The New York Times children 's Best Seller list and being listed as one of the Young Adult Library Services Association 's Best Books for Young Adults , among other awards .
Simplified: It has appeared on the New York Times children 's Best Seller list . Among other awards , it was also one of the Young Adult Library Services Association 's Best Books for Young Adults .