A Leaf on the Wind of All Hallows is a short story in Songs of Love and Death, an anthology edited by George R.R. Martin and Gardner Dozois. It was released on November 16, 2010.
On her blog (voyagesoftheartemis) on October 30, 2010, Dr. Gabaldon says, "It's a little unusual, in that it's about Roger MacKenzie's parents- but it does fill the interesting hole regarding Roger's father that I opened up in An Echo of the Bone."