“The Span of Empire” by Eric Flint and David Carrico.
Title: The Span of Empire Series: Jao Empire Number in Series: 3 (three) Author(s): David Carrico, Eric Flint Cover Artist: Bob Eggleton Language: English Publisher: Baen Books Published: September 2016 ISBN-10: 1476781532 ISBN-13: 9781476781532