Grand Admiral Thrawn is a Star Wars character with a long history. He first appeared back in 1991 in Timothy Zahns Heir to the Empire and its sequels, Dark Force Rising and The Last Command. Though not the first Star Wars books ever published, these three are largely considered the novels that started the Expanded Universe and would lead o countless other books being published. Those books have since been labeled Legends and removed from the official canon when Disney purchased the Star Wars property.
In 2016 the third season of Star Wars Rebels aired and Thrawn was brought back into the canon. He went on to appear in the fourth season and is slated to make an appearance in live-action during Ahsoka. This came alongside a new novel written by Zahn titled Thrawn. The novel explores his backstory prior to his appearance in the series. Zahn went on to write a second novel taking place between seasons three and four of Rebels and one final book in his trilogy that explored his brief absence from the series in season four.
From there Zahn would go on to write the Ascendency trilogy which followed Thrawn before he made contact wiht the empire and back during his time serving in the Chiss Ascendency. Since then there have been no more Thrawn novels published but Zahn has hope that its not over yet.
“I would like to write more novels,” he said. “And we pitch ideas to Lucasfilm. As for Thrawn, there’s a nine-year gap between the end of Rebels and the character’s reappearance in Ahsoka. There are things to do during this time. I’ll keep you up-to-date!”
Hopefully this means that more Thrown books are on the horizon. It would be exciting if we got a trilogy that detailed what exactly happened during the gap between Rebels and Ahsoka. And who knows just what else is in store for Thrawn.