As most hardcore fans know, the character of Thrawn was introduced in the 1990s in a trilogy of now Legends novels set after Return of The Jedi as a threat from the old Empire to the New Republic. The backbone of the character was his ability to strategize and use what he knew (or could discover) about an advisory against them. In the first two canon novels, Thrawn and Thrawn: Alliances, much of that skill in the context of action/battle sequences was missing. This novel more than makes up for what was lacking in those novels. I will not go into too much detail about the plot, but the story centers around a danger/threat to the Stardust initiative, which, as everyone likely to read this knows, was the construction of the first Death Star, as well as to Thrawn's species, the Chiss. The novel features appearances by Governor Tarkin, Director Krennic, and The Emperor. While the cover of the novel suggests that the Emperor has a larger role in the novel, he really has only a small appearance, mostly at the end. The novel also alludes to the events from the series Rebels, which first reintroduced the Thrawn character in the TV series, as Thrawn is eager to get back to Lothal and deal with the situation presented by Ezra Bridger.
The hardcover version of the book is just about 400 pages long. It reads fairly quickly, especially since most of the characters that appear in the book are well-developed or have already been established in the movies. Overall, while I do not think this novel is as good as the original "Thrawn Trilogy," which many hoped would be the basis for a sequel trilogy before the original cast members got too old to make that a reality, it is the closest to those novels in terms of all that makes the character of Thrawn great. There is definitely some political strategizing and infighting that has been a part of much of the canon material, but the book has a very good mix of action sequences to keep the story moving along. Chances are, if you are a die-hard fan of Star Wars, you are probably already getting the hardcover versions of the novels as they are released. But, if you are one who is more selective about which novels you get, this one is definitely worth picking up.