There are many authors who have written Star Wars books, but some of the most well-known include:
* George Lucas: The creator of Star Wars and author of the original movie scripts.
* Timothy Zahn: Author of the "Thrawn" trilogy, considered one of the most important additions to the Star Wars canon.
* James Luceno: Author of several popular novels, including "Darth Plagueis" and "The Last Jedi: The Novelization".
* Chuck Wendig: Author of the "Aftermath" trilogy, which bridges the gap between "Return of the Jedi" and "The Force Awakens".
* Claudia Gray: Author of "Bloodline", which follows Leia Organa's political career.
* E.K. Johnston: Author of "Queen's Shadow", which tells the story of Padmé Amidala's time as Queen of Naboo.
* Drew Karpyshyn: Author of the "Knights of the Old Republic" series, which explores a different era in the Star Wars universe.
There are many other authors who have contributed to the Star Wars universe, and it would be too long to list them all here.
If you have a specific Star Wars book in mind, please let me know and I can tell you who wrote it.