It’s rewarding, as a music fan, to observe how a favorite artist grows, matures, and evolves from one album to the next. It’s like spending a time with an old friend when it’s been years since your last visit — there are new lines on faces and new stories to tell, but somewhere deep beneath it’s your same old friend, and the same old you. But — if things are going well — maybe a little bit better. So far this month we’ve heard from several old friends in the roots music sphere, including Justin Townes Earle with his seventh album, Kids in the Street, and Benjamin Booker, who has followed up his 2014 debut with Witness.