The Third Gleam marks a return to the Avett Brothers’ roots, both sonically and with Seth & Scott playing as a trio with longtime bassist Bob Crawford. The eight tracks capture their personal experiences and perspectives on undeniably timely, universal themes: isolation, gun violence, incarceration, historical prejudice, mortality, resilience, love, hope, redemption. 12 years in the making, this is the third installment of the brothers’ ongoing Gleam series.