This mammoth chronicle of the legendary Bob Dylan's five-decade-spanning career contains his best-known works (among them 'The Times They Are A-Changing' and the oft-covered 'Knockin' On Heaven's Door') as well as some obscure tracks from his more experimental periods. Though he was originally notable for his politically motivated anthems, a focus on musical progression has prevailed in later recordings. With Dylan's never-ending touring schedule and frequently evolving creative output still flourishing, this retrospective is as timely as it is detailed.