They pop up every year and come out of the woodwork just before the holidays: those expansive and expensive collectors' packages that mine every corner of a musician's back catalog. The box set, says critic Tom Moon, is "a lavish production that's geared to the completist: someone who just has to have every last morsel of music from an artist." Here, Moon tells NPR's Melissa Block why three new collections are worth your attention.
Copyright 2012 National Public Radio. To see more, visit http://www.npr.org/.