There are 3 books in the Star Wars: The Ascendancy Trilogy series. The newest book is Lesser Evil which came out in 2021.

1
Chaos Rising

Book cover of Chaos Rising

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NEW YORK TIMES BESTSELLER Discover Thrawn's origins within the Chiss Ascendancy in the first book in an epic new Star Wars trilogy from bestselling author Timothy Zahn.

Beyond the edge of the galaxy lies the Unknown Regions: chaotic, uncharted, and near impassable, with hidden secrets and dangers in equal…

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2
Greater Good

Book cover of Greater Good

Thrawn and his allies race to save the Chiss Ascendancy from an unseen enemy in the second book in the epic Star Wars: Thrawn Ascendancy trilogy from bestselling author Timothy Zahn.

Thrawn's latest triumph still rests newly on his shoulders. He has led the Chiss to victory and brought glory…

3
Lesser Evil

Book cover of Lesser Evil

The fate of the Chiss Ascendancy hangs in the balance in the epic finale of the Star Wars: Thrawn Ascendancy trilogy from bestselling author Timothy Zahn.

For thousands of years The Chiss Ascendancy has been an island of calm, a center of power, and a beacon of integrity. Led by…