The Light in Exile(1990)
(The first book in the Network-Consortium series)
A novel by Cheryl J Franklin
Ingram The Adraki, last survivors of a powerful alien race, roved the spaceways, calling no world home. But the Adraki suddenly seemed to have an interest in peaceful Siatha, and Caragen, the most influential man in Network space, sought an alliance with them--if he could overcome the mysterious and dreadful force hidden on Siatha itself!
Used availability for Cheryl J Franklin's The Light in Exile
January 1990 : USA Mass Market Paperback