Mark’s last album, 2004’s Savin’ the Honky Tonk, was a startling return to form, a reiteration of core values that brought him back to country’s front ranks—artistically if not commercially. Heard It in a Love Song lacks that album’s sense of focus, although its feel is nearly as uniform and appealing. It’s a gentler, more delicate Mark we get here, essaying a set of laid-back tunes about relationships—including the beloved likes of Waylon Jennings’ “Dreaming My Dreams With You” and Tammy Wynette’s “Apartment #9.” It’s another sure step in a sterling country comeback.