Johnny Cash may be gone, but luckily for his fans and music lovers in general, he left a surprising number of songs for future enjoyment in his American Recordings series. American VI: Ain't No Grave by Johnny Cash ($8) is the sixth and final installment in this celebrated series, produced once again by Rick Rubin, and packed with more of the thoughtful, spiritual, and introspective songs that were the hallmark of Cash's later years, capped off by a tearjerking rendition of "Aloha 'Oe," the traditional Hawaiian song of farewell.