Unbreakable Soldiers Books in Order

Seeking escape from a violent family, military engineer Vellem accepts marriage to an enemy prince as part of a peace agreement. The new country offers purpose and freedom, until tragedy forces him to attempt rebuilding far more than roads and bridges.

Despised prince Istari lives as a peace hostage among people who blame his family for tragedy. Kind Lord Teverem offers unexpected comfort, but a secret within Teverem's household connects to Istari's past and threatens to reignite war.

After claiming his throne, Morrin treasures the unconventional family he has built with his closest companions. Pressure to marry for the kingdom's sake threatens that balance, especially when his friends propose a princess he considers thoroughly unremarkable.

Former street thief Bertin has survived by assuming another boy's identity and serving as a spy. Posted to watch a king in a conquered realm, he faces renewed danger when a warning and an unexpected arrival threaten to expose his past.