As if the Penguin Poets weren't tempting enough, in these straitened times, if you are in need of something to collect that will satisfy the craving and yet not break the bank, you should definitely check out Zodiac Books. Between about the late 1930s and the 1950s, Chatto & Windus issued this series of small hardcover books - similar in size and format to Ladybird Books, always with jackets and with the same wonderful pattern printed on the jacket as on the boards beneath. They were literary 'snippets' from Shakespeare and Donne to Cobbet and Keats. The best thing about them is that nobody seems to have created a 'craze' for them and you can routinely pick them up both online and in real bookshops for £1 or £2, even with jackets. The two above I bought today and they cost me £3.50 for the two. Wonderful stuff!
The two scans below I nicked from Camilla Ellis's blog, but there appear to be a good number of these titles, sometimes with the same pattern printed in a different colourway. No indication that I can find of design credits but they really are very cool books and would make a great collection when completed.