The husband-and-wife musical duo of Les Paul & Mary Ford enjoyed immense popularity in the 1950s, with their popular appeal based as much on their musical talent as the revolutionary recording techniques developed by Paul. Both were music industry veterans when they came together as a couple, both professionally and romantically. Les Paul was one of the giants of music innovation in the 20th century, inventing multi-track recording, studio techniques such as "close miking," and -- most famously -- designing and building one of the first solid-body electric guitars. Iris Summer...