The methodology for this article is the same as the adult novel methodology, if a book is written by more then one author, both authors are given credit for it. For the series that have both novels and accompanying game books, I have only given the author credit for the novel in this list.
One caveat with this list is that unlike the adult novel list, I have only read and own a few of these books. The young adult books in my collection are; The Last of the Jedi 1-10, Jedi Shadow and Sunrise Young Jedi Knight compilations, YJK 6: Jedi Under Siege, YJK 8: Diversity Alliance, and YJK 11: The Emperor's Plague. I have used Wookieepedia, the Star Wars Wiki as reference to compile this list. However any errors or omissions are my fault and please bring them to my attention in the comments section.
1 YOUNG ADULT NOVEL
Christopher Golden: Shadows of the Empire: Junior Novelization.
John Peel: Journal: The Fight For Justice.
Todd Strasser: Journal: Anakin Skywalker.
Donna Tauscher: Journal: Hero for Hire.
Tracey West: The Clone Wars Movie: Junior Novelization.
2 YOUNG ADULT NOVELS
Terry Bisson: Boba Fett 1: The Fight to Survive, Boba Fett 2: Crossfire.
K.D. Burkett: Star Wars Science Adventures (SWSA) 1: Emergency in Escape Pod Four, SWSA 2: Journey Across Planet X.
3 YOUNG ADULT NOVELS
Nancy Richardson: Junior Jedi Knights (JJK) 1: The Golden Globe, JJK 2: Lyric’s World, JJK 3: Promises.
A.L. Singer: Ep. I Adventures 11/13: Danger on Naboo, Ep. I Adventures 12/14: Podrace to Freedom, Ep. I Adventures 15: The Final Battle.
Patricia C. Wrede: Star Wars Episode I: The Phantom Menace Junior Novelization, Star Wars Episode II: Attack of the Clones Junior Novelization, Star Wars Episode III: Revenge of the Sith Junior Novelization.
4 YOUNG ADULT NOVELS
Elizabeth Hand: Boba Fett 3: Maze of Deception, Boba Fett 4: Hunted, Boba Fett 5: A New Threat, Boba Fett 6: Pursuit.
6 YOUNG ADULT NOVELS
Hollace Davids: Jedi Prince (JP) 1: The Glove of Darth Vader, JP 2: The Lost City of the Jedi, JP 3: Zorba the Hutt’s Revenge, JP 4: Mission from Mount Yoda, JP 5: Queen of the Empire, JP 6: Prophets of the Dark Side.
Paul Davids: Jedi Prince (JP) 1: The Glove of Darth Vader, JP 2: The Lost City of the Jedi, JP 3: Zorba the Hutt’s Revenge, JP 4: Mission from Mount Yoda, JP 5: Queen of the Empire, JP 6: Prophets of the Dark Side.
Alex Wheeler: Rebel Force (RF) 1: Target, RF 2: Hostage, RF 3: Renegade, RF 4: Firefight, RF 5: Trapped, RF 6: Uprising.
12 YOUNG ADULT NOVELS
John Whitman: Galaxy of Fear (GoF) 1: Eaten Alive, GoF 2: City of the Dead, GoF 3: Planet Plague, GoF 4: The Nightmare Machine, GoF 5: Ghost of the Jedi, GoF 6: Army of Terror, GoF 7: The Brain Spiders, GoF 8: The Swarm, GoF 9: Spore, GoF10: The Doomsday Ship, GoF 11: Clones, GoF 12: The Hunger.
14 YOUNG ADULT NOVELS
Kevin J. Anderson: Young Jedi Knights (YJK) 1: Heirs of the Force, YJK 2: Shadow Academy, YJK 3: The Lost Ones, YJK 4: Lightsabers, YJK 5: Darkest Knight, YJK 6: Jedi Under Siege, YJK 7: Shards of Alderaan, YJK 8: Diversity Alliance, YJK 9: Delusions of Grandeur, YJK 10: Jedi Bounty, YJK 11: The Emperor’s Plague, YJK 12: Return to Ord Mantell, YJK 13: Trouble on Cloud City, YJK 14: Crisis at Crystal Reef.
Dave Wolverton: Jedi Apprentice 1: The Rising Force, Ep. I Adventures 5/7: The Ghostling Children, , Ep. I Adventures 6/8: The Hunt for Anakin Skywalker, Ep. I Adventures 7/9: Capture Arawynne, Ep. I Adventures 8/10: Trouble on Tatooine, SWM 5: The Hunt for Han Solo, SWM 6: The Search for Grubba the Hutt, SWM 7: Ithorian Invasion, SWM 8: Togorian Trap, SWM 9: Revolt of the Battle Droids, SWM 13: Prisoner of the Nikto Pirates, SWM 14: The Monsters of Dweem, SWM 15: Voyage to the Underworld, SWM 16: Imperial Jailbreak.
17 YOUNG ADULT NOVELS
Rebecca Moesta: JJK 4: Anakin’s Quest, JJK 5: Vader’s Fortress, JJK 6: Kenobi’s Blade, Young Jedi Knights (YJK) 1: Heirs of the Force, YJK 2: Shadow Academy, YJK 3: The Lost Ones, YJK 4: Lightsabers, YJK 5: Darkest Knight, YJK 6: Jedi Under Siege, YJK 7: Shards of Alderaan, YJK 8: Diversity Alliance, YJK 9: Delusions of Grandeur, YJK 10: Jedi Bounty, YJK 11: The Emperor’s Plague, YJK 12: Return to Ord Mantell, YJK 13: Trouble on Cloud City, YJK 14: Crisis at Crystal Reef.
36 YOUNG ADULT NOVELS
Ryder Windham: The Life and Legend of Obi-Wan Kenobi, The Rise and Fall of Darth Vader, Episode 1 Adventures 1: Search for the Lost Jedi, Episode I Adventures 2: The Bartokk Assassins, Ep. I Adventures 3: The Fury of Darth Maul, Ep. I Adventures 4: Jedi Emergency, Ep. I Adventures 9: Rescue in the Core, Ep. I Adventures 10: Festival of Warriors, Ep. I Adventures 11: Pirates from Beyond the Sea, Ep. I Adventures 12: The Bongo Rally, Star Wars Adventures (SWA) 1: Hunt for the Sun Runner, SWA 2: The Cavern of Screaming Skulls, SWA 3: The Hostage Princess, SWA 4: Jango Fett vs. The Razor Eaters, SWA 5: The Shape-Shifter Strikes, SWA 6: The Warlords of Balmorra, The Clone Wars Secret Missions (CWSM) 1: Breakout Squad, CWSM 2:Curse of the Black Hole Pirates, CWSM 3: Duel at Shattered Rock, A New Hope: The Life of Luke Skywalker, Adventures in Hyperspace: Fire Ring Race, Adventures in Hyperspace: Shinbone Showdown, Star Wars Episode IV: A New Hope Junior Novelization, Star Wars Missions (SWM) 1: Assault on Yavin Four, SWM 2: Escape from Thyferra, SWM 3: Attack on Delrakkin, SWM 4: Destroy the Liquidator, SWM 10: Showdown in Mos Eisley, SWM 11: Bounty Hunters vs. Battle Droids, SWM 12: Vactooine Disaster, SWM 17: Darth Vader’s Return, SWM 18: Rogue Squadron to the Rescue, SWM 19: Bounty on Bonadan, SWM 20: Total Destruction, Star Wars Episode V: The Empire Strikes Back Junior Novelization, Star Wars Episode VI: Return of the Jedi Junior Novelization.
47 YOUNG ADULT NOVELS
Jude Watson: Legacy of the Jedi, Jedi Apprentice(JA) 2: The Dark Rival, JA 3: The Hidden Past, JA 4: The Mark of the Crown, JA 5: The Defenders of the Dead, JA 6: The Uncertain Path, JA 7: The Captive Temple, JA 8: The Day of Reckoning, JA 9: The Fight for Truth, JA 10: The Shattered Peace, JA 11: The Deadly Hunter, JA 12: The Evil Experiment, JA 13: The Dangerous Rescue, JA Special Edition: Deceptions, JA 14: The Ties That Bind, JA 15: The Death of Hope, JA 16: The Call to Vengeance, JA 17: The Only Witness, JA 18: The Threat Within, JA Special Edition: The Followers, Secrets of the Jedi, Journal: Darth Maul, Journal: Queen Amidala, Jedi Quest (JQ): Path to Truth, JQ 1: The Way of the Apprentice, JQ 2: The Trail of the Jedi, JQ3: The Dangerous Games, JQ 4: The Master of Disguise, JQ 5: The School of Fear, JQ 6: The Shadow Trap, JQ 7: The Moment of Truth, JQ 8: The Changing of the Guard, JQ 9: The False Peace, JQ 10: The Final Showdown, The Last of the Jedi(LotJ) 1: The Desperate Mission, LotJ 2: Dark Warning, LotJ 3: Underworld, LotJ 4: Death on Naboo, LotJ 5: A Tangled Web, LotJ 6: Return of the Dark Side, LotJ 7: Secret Weapon, LotJ 8: Against the Empire, LotJ 9: Master of Deception, LotJ 10: Reckoning, Journal: Captive of Evil, Star Wars Science Adventures (SWSA) 1: Emergency in Escape Pod Four, SWSA 2: Journey Across Planet X.
There you have it ladies and gentleman, not only is Jude Watson (Judy Blundell) the author of some of the best young adult novels, but she is also the most prolific of the young adult novel authors.
SOURCE: Wookieepedia Timeline of Books