The First Sister Trilogy Books in Order

A voiceless priestess ordered to spy on a new captain begins questioning the institution that controls her life. Elsewhere, an elite soldier must hunt his former partner, whose secret recordings threaten to overturn everything he believes.

Astrid works to undermine the Sisterhood from within while Hiro searches for a mysterious ally to the rebellion. Across the solar system, dangerous rescues and divided loyalties draw more people into the struggle against entrenched power.

As rebellion spreads across the solar system, Astrid attacks the Sisterhood’s foundations while its new leader fights to reshape it. Grief, factional conflict, and a dangerous struggle over humanity’s future push their scattered allies toward a decisive confrontation.