Wisdoms of the Light (First Light) (Volume 2) by Michelle Frost

When Idrith escapes from Amyth monastery with Daen, he thinks their troubles are over, but the past will not leave them alone. There are secrets still to be uncovered in the lost city of Aerdas, and this time it will take a young Southerner to set things in motion. And it all begins with a song.

Sometimes the truth is a miracle.