Qui-Gon Jinn is a Jedi considered a bit of a maverick by the Jedi council because he doesn’t always follow the Code. He focused more on the Living Force than on the Unifying Force. He was secretly learning how to be able to allow himself in the living Force after death.
Qui Gon Jinn was trained by Dooku, who later left the Order and fell to the Dark Side. Qui-Gon had at least 2 padawans. His first, Xanatos, left him and the Order. This is detailed in a Dark Horse Graphic novel called Dark Side and several of the Jedi Apprentice books.
His second was Obi-Wan Kenobi. The two balanced each other. They shared many missions, including missions to restore peace, expose corruption, and taking on pirate gangs. They shared battles during the Stark Hyperspace Conflict, the attack by the Yinchorri against the Jedi, a plot against Valorum on Ord Mantell and activities involving the Trade Federation and the piracy of Nebula Front.
On his last mission, it was Obi-Wan who sensed distant danger on going in to negotiate with the Trade Federation to end the blockade of Naboo. But it was Qui Gon who immediately realized there was no logic to their actions, no apparent gain, when they invaded, given that gain is their usual motive.
Qui Gon Jinn was also the one who discovered young Anakin Skywalker on Tatooine, and urged the Jedi Council to train him.
On Qui-Gon’s death, his last act was to ask Obi-Wan to train him.
Afterward Qui-Gon tried to call out to Anakin when his mother died, alerting Yoda that he was somehow able to connect from the beyond. He appeared in a vision to Yoda, leading young Anakin (though he was grown at this time) into a tree on a mysterious planet to face his fears. He also appeared on Mortis to Obi-Wan and finally Yoda was able to hear his voice in deep meditation. Qui-Gon led him to those who were training him in how to manifest his spirit after death to guide the next generation.
Jedi Council (DH)
Last Stand on Ord Mantell (DH)
Murder on the Aurorient Express (DH)
Dark Side (DH) based on mentioned events in Jedi Apprentice
Stark Hyperspace wars
Jedi Apprentice Series
Cloak of Deception
Appeared Briefly in:
Clone Wars microseries
The Clone Wars Mortis story arc
Darth Maul Shadow Hunter