Booklet is the term for the small brochures, lyric- or information-sheets that come in CD covers nowadays. The booklet (this applies especially to releases where the artist doesn't only perform, but also make the music) normally comes as wonderful tiny artwork, often enhancing the personal consumption of the record. It almost always contains:
The
lyrics (if any) are also
printed in the booklet very
often. For
me fondly
created booklets are a very
good reason to
buy a record instead of only
downloading it (maybe the
inferiority of booklets, widespread in
popular music records where the only information in the booklet is
who (other than the artist) wrote the
songs and where to get
merchandise, is also a reason for the
declining sales
figures in these
music genres).