It would be easy for Natalie Grant to rely only on her compelling vocal presence, but thankfully she continues her commitment to meaningful lyric content on her 2008 album Relentless. As with her 2005 breakthrough Awaken, Grant applies her formidable pipes to a set of above-average tunes, avoiding glib slogans in favor of darker, more probing expressions. For those with a taste for big, brawny rock tracks, “I Will Not Be Moved” finds her rising to heroic heights amidst roaring volleys of guitar. The billowing R&B of “Perfect People” and the silken electronica of “Wonderful Life” display the softer end of her range to full advantage. Grant shines most of all on the album’s ballads, delivering aching performances against brooding piano and string arrangements. “Safe,””Our Hope Endures,” and “Make a Way” offer stirring expressions of God’s promise of healing and redemption. Serious in intent and near-flawless in execution, Relentless is a classy and often moving work by one of Christian music’s most formidable talents.