There's quite a cool little gift box you can buy which contains 100 postcards with different Penguin book covers on. Much like Phil Baines's book, which I love, it seems to have captured the imagination of the design / literature crowd, who find a sort of quaint excitement amongst the dog eared edges, the vintage colour palletes and the modern designs spanning nearly 80 years.
My good friend Jess had an amazing idea to capture some of this excitement, with The Penguin Postcard Project. The idea is quite simple; you sign up, she'll send you a randomly selected postcard. You then obtain and review the book, writing your review on the back of the postcard, and send it back to Jess. Her blog showcases the reviews as they come in, from all over the world.