The Guardian is celebrating the best of this year's children's fiction with its annual prize, the Guardian children's fiction prize, and if you are aged 17 or under and love reading, you can enter our Young Critics competition.

Write a review (max 200 words) of one of the books in the Guardian children's fiction prize 2014 longlist as an individual and you could win a complete set of eight longlisted books plus a £20 National Book Token gift card. You can enter as a school: if at least three of your class all submit reviews, the school that is judged to have the strongest overall entry will win a visit to the Guardian Education Centre and receive a set of the eight longlisted books and a £150 National Book Token. See the Guardian site for more details.