Paladin of Souls (World of the Five Gods, #2)

by Lois McMaster Bujold

Three years ago, by the labor and sacrifice of others, I was released from my long bondage.

In bondage for 15 years? Question 19 y.o. at the beginning, 22 at the death of dy Lutez. + 15 = 37; this story opens 3 years later, when she’s 40.