Tom Petty and the Heartbreakers are known for blending country, blues, pop, punk and doo-wop into an Americana stew. On their new release, Mojo, they go back to their Gulf Coast roots and emerge with an album drenched in blues as black as the BP oil goo! No more are the pop melodies of the past; Tom Petty’s nasal voice is still a familiar comfort but here the blues reigns king with lead guitarist Mike Campbell selling his soul at the crossroads. His guitar is like another voice, unleashed, with nods to the great guitar gods of the past. Like other great blues bands, the Heartbre...