Also yes, there is an order. Google the series, download the books in order. Just FYI the main story gets a bit slow ngl, at least for my tastes. I'm on book 6 rn and just gonna finish the series because I've already dedicated this much time and I'm a fast reader. But I've read better series.
The first 4 books are in the POV of the main characters of the manga. Then there are 2 or 3 books in the POV of side couples, then at the end of the series it's back to the main couple.
TBH I can see why the manga wasn't continued, bc the books get dry sometimes and repetative. But give them a shot, you might like it ╮( ̄▽ ̄)╭
Hell & High Water, THIRDS Book 1
Blood & Thunder, THIRDS Book 2
Rack & Ruin, THIRDS Book 3
Rise & Fall, THIRDS Book 4
Against the Grain, THIRDS Book 5
Catch a Tiger by the Tail, THIRDS Book 6
THIRDS Beyond the Books, Vol 1
Smoke & Mirrors, THIRDS Book 7
Thick & Thin, THIRDS Book 8
Darkest Hour Before Dawn, THIRDS Book 9
Gummy Bears & Grenades, A THIRDS Novella
Tried & True, THIRDS Book 10
THIRDS Beyond the Books, Vol 2
Love and Payne, THIRDS Rebels
Gone But Not Forgotten, TIN Book 1
Cold Light of Day, A TIN Novella

the Manhwa will sadly not continue cause it did not become popular enough ╥﹏╥ the book author said so herself. BUT the series have 10 books!! and let me just tell you, that the T.H.I.R.D.S book series, are the reason I read books today. I hated books when I was younger. I only wanted to read comics etc. But Dex's sunshine and incredibly personality and an accident spoiler from book 7, made me pick up the books. AND THEY DID NOT DISAPPOINT!!!
So please people, if you loved the manhwa, I can only recommed that you pick up the books! And if its possible, please support the author Charlie Cochet. and who knows maybe the manhwa will get picked in the future
here is a link to were you can read the first book, and you can probably also find the rest there. Please do buy the books, if you loved reading them illegal!! https://www.epub.pub/book/hell-and-high-water-by-charlie-cochet