Use Your Illusion II is the fourth studio album by GnR. It was the second of two albums releases in conjunction with the Use Your Illusion Tour, the other being Use Your Illusion I. The two are sometimes considered a double album.
In fact, in the original vinyl releases, both Use Your Illusion albums are double albums. Material for all two/four discs (depending on the medium) was recorded at the same time and there was some discussion of releases a "quadruple album."