Billy's Books 39: Thrawn Ascendancy: Chaos Rising

Yes, it's a Star Wars novel, another in the Thrawn series, Thrawn Ascendancy: Chaos Rising. This one's a "prequel", showing Thrawn's climb in rank and status with his own people, the Chiss Ascendancy, beyond the galaxy far, far away.

If you'd like some further reading, here is an interview with the author about this book.