Inexpensive paperback children's fiction did not exist at the time Penguin sought to expand their list into this new market. To this end Eleanor Graham was appointed in 1941 as the first editor of the "Puffin Story Books" series, a venture made particularly difficult due to the resistance of publishers and librarians in releasing the rights of their children's books. The first five titles, "Worzel Gummidge", "Cornish Adventure","The Cuckoo Clock", "Garram the Hunter" and "Smokey" were published in the three horizontal stripes company livery of the rest of the Penguin output, a practice abandoned after the ninth volume when full-bleed colour illustrated covers were introduced, a fact that heralded the much greater design freedom of the Puffin series over the rest of Penguin's books.