On their third album Led Zeppelin took their music in a different direction, filling the album with a folky, acoustic sound. The second half of the album is filled with English folk tunes like Gallows Pole.

For the Beatles, writing songs was a process that could happen anytime -- songs we all know by heart often began as a scribble on the back of an envelope or on hotel stationery. These original documents have ended up scattered across the world at museums and universities and with collectors and friends. Many have never been published before. More than 100 songs and lyrics are reproduced in The Beatles Lyrics, providing Hunter Davies a unique platform...