Recorded in a race against his encroaching Alzheimer's, Adiós was crafted as a farewell letter to Glen Campbell's many fans, drawing on a classic mix of country and pop that evokes the singer’s '60s/'70s salad days. From joining Willie Nelson for the latter's bittersweet "Funny How Time Slips Away" to transforming Bob Dylan's "Don't Think Twice, It's All Right" into a country two-step, Campbell put a powerful period at the end of his legendary discography.