Based on this list, I pulled Goodreads ratings for over 350 original Star Wars fiction releases and re-ranked them by the cube of the rating (expressed as a percentage) times the log of the number of raters.

By that metric, here are the 50 most popular Star Wars novels:

 1. Timothy Zahn, The Last Command (Star Wars: The Thrawn Trilogy, #3)
 2. Timothy Zahn, Dark Force Rising (Star Wars: The Thrawn Trilogy, #2)
 3. Timothy Zahn, Heir to the Empire (Star Wars: The Thrawn Trilogy, #1)
 4. Drew Karpyshyn, Path of Destruction (Star Wars: Darth Bane, #1)
 5. Drew Karpyshyn, Dynasty of Evil (Star Wars: Darth Bane, #3)
 6. Karen Traviss, True Colors (Star Wars: Republic Commando, #3)
 7. Karen Traviss, Order 66 (Star Wars: Republic Commando, #4)
 8. Karen Traviss, Hard Contact (Star Wars: Republic Commando, #1)
 9. Karen Traviss, Triple Zero (Star Wars: Republic Commando, #2)
10. Drew Karpyshyn, Rule of Two (Star Wars: Darth Bane, #2)
11. Timothy Zahn, Vision of the Future (Star Wars: The Hand of Thrawn, #2)
12. Aaron Allston, Wraith Squadron (Star Wars: X-Wing, #5)
13. Timothy Zahn, Specter of the Past (Star Wars: The Hand of Thrawn, #1)
14. Michael A. Stackpole, I, Jedi
15. Karen Traviss, Sacrifice (Star Wars: Legacy of the Force, #5)
16. Michael A. Stackpole, Rogue Squadron (Star Wars: X-Wing, #1)
17. Aaron Allston, Iron Fist (Star Wars: X-Wing, #6)
18. Aaron Allston, Solo Command (Star Wars: X-Wing, #7)
19. Michael A. Stackpole, Wedge's Gamble (Star Wars: X-Wing, #2)
20. Matthew Stover, Traitor (Star Wars: The New Jedi Order, #13)
21. Karen Traviss, 501st
22. Michael A. Stackpole, The Bacta War (Star Wars: X-Wing, #4)
23. Timothy Zahn, Allegiance
24. Aaron Allston, Starfighters of Adumar (Star Wars: X-Wing, #9)
25. Troy Denning, Star by Star (Star Wars: The New Jedi Order, #9)
26. James Luceno, The Unifying Force (Star Wars: The New Jedi Order, #19)
27. James Luceno, Darth Plagueis
28. Troy Denning, Invincible (Star Wars: Legacy of the Force, #9)
29. Michael A. Stackpole, Isard's Revenge (Star Wars: X-Wing, #8)
30. Karen Traviss, Revelation (Star Wars: Legacy of the Force, #8)
31. Aaron Allston, Fury (Star Wars: Legacy of the Force, #7)
32. Troy Denning, Inferno (Star Wars: Legacy of the Force, #6)
33. Michael A. Stackpole, The Krytos Trap (Star Wars: X-Wing, #3)
34. Timothy Zahn, Survivor's Quest
35. Troy Denning, Abyss (Star Wars: Fate of the Jedi, #3)
36. Karen Traviss, Bloodlines (Star Wars: Legacy of the Force, #2)
37. A.C. Crispin, Rebel Dawn (Star Wars: The Han Solo Trilogy, #3)
38. Timothy Zahn, Outbound Flight
39. Aaron Allston, Outcast (Star Wars: Fate of the Jedi, #1)
40. Steve Perry, Shadows of the Empire
41. A.C. Crispin, The Hutt Gambit (Star Wars: The Han Solo Trilogy, #2)
42. A.C. Crispin, The Paradise Snare (Star Wars: The Han Solo Trilogy, #1)
43. Troy Denning, Apocalypse (Star Wars: Fate of the Jedi, #9)
44. Aaron Allston, Betrayal (Star Wars: Legacy of the Force, #1)
45. Aaron Allston, Backlash (Star Wars: Fate of the Jedi, #4)
46. Christie Golden, Allies (Star Wars: Fate of the Jedi, #5)
47. R.A. Salvatore, Vector Prime (Star Wars: The New Jedi Order, #1)
48. Timothy Zahn, Choices of One
49. Troy Denning, Vortex (Star Wars: Fate of the Jedi, #6)
50. Aaron Allston, Exile (Star Wars: Legacy of the Force, #4)