concept album

:  something conceived in the mind :  thought, notion

:  an abstract or generic idea generalized from particular instances

:  organized around a main idea or theme

:  created to illustrate a concept

:  a book with blank pages used for making a collection (as of autographs, stamps, coins, or photographs)

:  a cardboard container for a phonograph record :  jacket

:  one or more recordings (as on tape or disc) produced as a single unit