1986’s Silence in Solitude is the second volume in the Roads of Heaven trilogy (and Scott’s fourth novel overall, if the ISFDB is to be trusted ).
The story begins six months after Silence arrives on Solitudo Hermae to begin her training as a magus. She is working under the supervision of Magus Isambard, an old ally.
As a female pilot in a fanatically patriarchal society, Silence was already unusual; her new career as a female magus makes her virtually sui generis .
This is not such a good thing, as the Hegemon has put a price on Silence’s head. Hard to be an inconspicuous fugitive when you are notably unique.