Offer now expired: Get 50% off Eyewitness Decade

Enjoy a fabulous 50% discount on a Book of the Week from the Guardian Bookshop . This week, you can save £12.50 when you buy Eyewitness Decade , a collection of awe-inspiring photographs capturing the defining moments of the last 10 years. The perfect gift for Christmas, Eyewitness Decade is half price until Monday 29 November. TAKE UP THIS OFFER Offer now expired HELP WITH OFFERS AND EVENTS You need to be a member of Extra in order to take up any offers, book events or enter competitions. You can sign up here. You also need to sign in to theguardian.com at the top left of the page.