Country singer/songwriter Elizabeth Cook made her Grand Ole Opry debut on March 17, 2000, appearing more than 400 times thereafter, the most ever by a non-member; a remarkable achievement considering that, at the time, she was an indie artist without a properly released album. But the excitement generated by her strong, crystalline singing voice -- as comfortable with bluegrass, blues, and folk as it was country -- and songwriting served to draw comparisons to respected artists such as Kelly Willis and Dolly Parton. Her proper debut was 2002's Hey Y'all, but it flopped. 2007's...