This is a 5 record box set celebrating 50 years of the band,released in late 2018.It’s a very good collection and has at least one song from every record they put out. The songs are in chronological order with the first record covering their blues period and on from there. There are no rare or unreleased tracks here but it does contain two songs from the 25 Years The Chain box set that were unreleased at the time. My one complaint is only one song from Penguin and it’s “Did You Ever Love Me” my least favorite on the record.It does have six songs from Rumors and five from Fleetwood Mac.Just a two page booklet comes with it with basic liner notes and a very short history of the band. I would have liked to see more. I have a copy of 25 Years the Chain in a 4 cassette edition and that comes with a booklet with 50 pictures of the band from all their phases. I listened to sides I and J covering their latest songs,the one record I hadn’t listened to when I bought it. Side I has songs from Tango In The Night and Behind The Mask both of which I owned at one time and the two songs from 25 Years The Chain. Side J has “Silver Springs” from the live album The Dance that I had on CD ,two songs from Say You Will from 2003 and a song from their 4 song EP that came out in 2013. These last three songs I had never heard before.