To celebrate our 70th birthday, we're giving away one very exclusive Pocket Penguin box set, signed by several authors. Simply answer all the questions correctly in our birthday quiz to enter the prize draw - good luck!

Entry to the compettion is bound by these terms & conditions.

1. This prize draw is open to all UK residents aged 18 and over. Employees of Penguin Books Limited are not eligible to enter. By entering this prize draw you will be deemed to have read and understood these terms and conditions and to be bound by them.

2. The address for entry is as stated in the entry details.

3. Closing Date for receipt of entries is 30th November 2005

4. No purchase necessary. Only one entry per person.

5. Entry to the draw is free and must be made on the official entry form, which can be found on the www.Happbirthdaypenguin.com website. Alternatively, to obtain a copy of the official entry form please send a request to: Happy Birthday Penguin prize draw, Penguin Online, 80 Strand, London, WC2R 0RL.

6. No responsibility can be accepted for incomplete, illegible, lost or damaged entries. Proof of sending is not proof of receipt. Entries via agents or third parties will be deemed invalid.

7. The winner will be drawn at random by Penguin Books Limited on 1st December 2005 from all entries that correctly answered the questions and were received by the closing date. The first entry to be drawn will receive the prize: The prize is an official box set of 70 Pocket Penguins, signed by several Penguin authors. The Prize is non-transferable and there are no cash alternatives.

8. The winner will be notified in writing by 1st January 2006. The winner's details will be made available after 1st January 2006 upon written request including a stamped addressed envelope for reply.

9. The winner agrees to the use of his or her name and photograph for publicity purposes and may be required to take part in publicity without additional payment or permission.

10. The prize described is available on the date of publication. Events may occur that render the promotion itself or the awarding of the prize impossible due to reasons beyond the control of Penguin Books Limited. Penguin Books Limited may at its absolute discretion vary or amend the promotion and the winner agrees that no liability shall attach itself to Penguin Books Limited.

11. The decision of Penguin Books Limited is final and binding for any situation, including any not covered in these terms and conditions. Correspondence will be entered into at the promoter's discretion.

12. Promoter: Penguin Books Limited, 80 Strand, London, WC2R 0RL.