there are 3 short stories that accompany the series, i think they are available for free. and Patrick Ness has written other books that are pretty good.
i cannot recommend a series that clicked with me the same way emotionally. but, you can check out /r/booksuggestions and /r/suggestmeabook for books that may pique your interest. then give them a go, because they might become your new favorites 100 pages in like Chaos Walking did. :D
Read A Monster Calls, also by Patrick Ness
Lemme say Chaos Walking is my favourite trilogy of all time, and seeing this post made me freaked out thinking "There's someone else who thinks the same as me??"
Really, apart from the amazing, original plot, story, sad deaths and character development, his writing style and prose is some of the greatest form of writing I've ever laid eyes upon. I'm honestly surprised he isn't on the top 50 writers of all time. The way he weaves narrative writing and the MAIN plot of the story(Noise) together so well requires some genius intellect