Thoughtful, earnest singer-songwriter Sara Groves is over 40 and has done 10 studio albums; you know what that means, right? It’s time for a “best of” compilation. “The Collection,” a compilation of her best songs from previous albums, is due out on Sept. 17th. It’s a two-disc set of 23 songs, plus 4 new songs. Groves will tour this September thru November with Bebo Norman and Andrew Peterson.