The following is a link for the top books for ages 6-8 year olds
http://www.booktrust.org.uk/books/children/booklists/242/
The following is a link for the top books for ages 9-11 year olds
http://www.booktrust.org.uk/books/children/booklists/243/
The following is a link for the top books for ages 12-14 years old and over