The first original song that George Thorogood ever wrote was "Bad to the Bone." Celebrating its 40th anniversary this year, the track is still omnipresent on classic rock radio and has been used in countless movies and television shows. Not a bad place to begin your career as a songwriter. Thorogood and his band have put their spin on plenty of blues staples over the years, notably making radio classics out of John Lee Hooker's "One Bourbon, One Scotch, One Beer," "Move It On Over" by Hank Williams and Bo Diddley's "Who Do You Love." But Thorogood felt pigeonholed as...