Series
There are 3 books in the Traitor Spy Trilogy series.
Published between 1960 and 2012, in the same order they are meant to be read.
Twenty years after the Black Magician Trilogy, Sonea's son Lorkin joins an expedition to the hostile land of Sachaka as a Guild Ambassador's assistant. As political tensions rise and old enemies resurface, secrets about a mysterious magical society threaten to ignite conflict. Canavan returns to her
All 3 books total 1,551 pages.
The Books Oracle — track the series you are partway through, and see what to read next.