Book excerpt: Aging Texas billionaire Cash Carruthers decides to give up his businesses to sing the blues. Amber Fanfare, a 20-year-old barroom belter with a powerhouse voice, wants to help him. Cruise-ship mogul Diana Copeland wants to build a private floating island. Have they lost their minds? Or is it just their America Gene acting up? They have the money and the talent to make their dreams come true, broadening their horizons in the ways that Americans have always believed was their birthright. But will their dreams lead them to reshape their shared reality on the way to happiness, or just strand them in their own Personal Las Vegas, going zonkers Elvis-style, with no one left to rein them in.