National Geographic provides free maps, photos, videos and daily news stories, as well as articles and features about animals, the environment, cultures, history, world music and travel.
By now(2009) the only Chinse edition of this book is published in Taiwan, yet it's hard to purchase one in vast area China with a cheaper price. Pitty. The English version could be bought within the price about 88 Yuan on Amazon.cn:
http://www.amazon.cn/detail/product.asp?prodid=enbk607439&source=douban