To celebrate the 70th Birthday of Penguin they launched an amazing set of paperback books.

Short stories and extracts from some of the greatest books by the greatest writers from the last 70 years. The spines of the books were all nice colours, and when you bought the special aniversary package it looks like a lovely rainbow.

So we made a lovely-rainbow-book-spine website.

They say never judge a book by its cover. But we reckon that's a load of old tosh. Especially not when they're interactive, pull-outable, flippable covers on the Internet.