It took a while for Pink Floyd to regain their focus but, when they did, it eventually resulted in the 1973 album The Dark Side of the Moon.  One of the most popular and well-known albums in the world, it shot the band to a level of stardom they previously failed to achieve.  After a long tour, a long recording session and Roger Waters coming more to the forefront of the band, Wish You Were Here was released in 1975.  Partially a tribute to Syd Barrett, partially a warning about the music industry, it gives their previous album quite a challenge for the best in the group's catalog.