(Happy ObiMaul headcanon for @yaoikuza-probably won’t be the last thing i tag you in)
AU where Maul doesn’t die; Obi-Wan never intended to kill him just temporarily knock him out so he could have some time to think. Through that act of mercy, not only does Maul heal but he and Obi-Wan become friends and see they have a lot in common. Most importantly, they share a love for reading. Obi-Wan has collected tons of books over time, and has multiple copies of some of the same volumes. So he gives Maul a lot of his volumes, and of course Maul reads them quickly despite their length. After a while, the two will just sit there, discussing the books, and the characters, themes, etc…etc..
And though Obi-Wan has read these books repeatedly and knows them like the back of his hand, having conversations with Maul intrigues him. There are themes Obi-Wan has never thought of, or certain things in the books that he’s missed that Maul notices, and it just sets up a lovely discussion.
And with Maul, talking about any book is always more exciting since Obi-Wan has been alone and he too enjoys delving deeper into the pages with another mind to discuss with. And through reading, discussing (the present, and their pasts) and just spending time together, they grow close. They already have so many similarities so it isn’t hard for a bond, especially when they no longer have anything to lose.
Obi-Wan has found a friend and companion in the least way he thought possible and the same goes for Maul. It’s safe to say the both are happy.
This of course goes on for a few more months until Maul is healed, and announces that he’s going to leave. Obi-Wan knew his time was coming, but he is saddened by it. Yet, he doesn’t try to stop Maul, because he knows there’s still a lot Maul needs do for himself. He’s healed but not completely. Though he no longer hates Obi-Wan there is still a lot of pain and hatred that only a self journey will fix. So Obi-Wan lets him go, he encourages him too.
And before Maul leaves, Obi-Wan gives him every single one of the books they’ve read and discussed together. It’s a rather bitter sweet departure, because something in Obi-Wan’s gesture tells Maul that he will may never see him again. But they hope for the best for each other and both depart on good terms.