Retrospective contains all of the Animals' Billboard Top 40 hits from "House of the Rising Sun" to "Sky Pilot", and even contains an extra track,"Spill the Wine", Eric Bourdon's first hit with the group War.  (Although I really don't understand this song, it was a major hit reaching #3 in 1970 on the Billboard Top 40.)  It also includes a number of extras that did not make the U.S. Billboard Top 40, but are very good songs, such as "Baby Let Me Take You Home", "Anything", and "White Houses".  There are 22 tracks in all, and they are on a single CD, which I like.  Also, there are no live cuts which, to me, are inferior to the studio cuts which, fortunately, are on this CD.  The only comment I have is I would like to have seen "Good Times" included, a song with a real message, but nothing is "perfect".  Overall, this is an excellent CD that would be my first choice for anyone who is or was a fan of the Animals.