Sister Time

Sister Time is a novel by John Ringo and Julie Cochrane, and is part of the Legacy of the Aldenata series, specifically a spin-off that features Michael O'Neal's daughters Cally and Michelle. Michelle has been raised off planet by the Indowy race, and has been trained in highly advanced mental techniques. As established in the earlier Cally's War, Cally is a dangerous assassin. They meet for the first time since the war, but it is not certain if they will be allies or enemies.