It looks like the first volume in this is coming out in May 2020.
https://www.penguin.co.uk/books/111/...529124583.html
Naturally, Timothy Zahn is writing itThe first book in a new trilogy set before Thrawn traveled to the Empire and became a Grand Admiral. Journey to the Unknown Regions and learn more about Thrawn’s origins and his home: The Chiss Ascendency.
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