Bog Child by Siobhan Dowd

Digging for peat in the mountain with his Uncle Tally, Fergus finds the body of a child, and it looks like she's been murdered. As Fergus tries to make sense of the mad world around him - his brother on hunger-strike in prison, his growing feelings for Cora, his parents arguing over the Troubles, and him in it up to the neck, blackmailed into acting as courier to God knows what, a little voice comes to him in his dreams, and the mystery of the bog child unfurls.

Bog Child is an astonishing novel exploring the sacrifices made in the name of peace, and the unflinching strength of the human spirit.