If you're a speedy reader and have already read Harry Potter and the Half-Blood Prince, then why not write about it?
The Newsround website is looking for a budding book critic to review JK Rowling's latest magical adventure.
The best review will get to go on the reviews page of the Newsround site for everyone to read!
It will also be read out by Potter potty presenter Lizo in a live webchat!
The webchat is called the Half-Blood Half Hour and will be from 5.45-6.15pm on Friday 22 July.
You will need to have read the whole book before you enter this competition!
To enter, fill in the form below and answer the following question:
What is the name of Harry's owl?
The competition closed at midday on Thursday 21 July 2005.