It's always good to remember that Sam wasn't just paralleling Colette or Abel, he wasn't just combination of both, he was so much more than that. He did the thing neither of them could. He freed Dean from the mark at cost of the universe and it was something even the original lover and brother could do for Cain, neither of them obsessed and insane enough to truly save Cain.
Supernatural does this thing where it creates parallels between some duo and samdean and always ends it with "sam and dean were even more inseparable and obsessed than the thing we introduced". They were beyond biblical brothers, their bond was deeper and more intimate than anything represented in the show and there was ALWAYS this reminder that they are like no one else.
just want to be like super super clear about something
THE DREAMERS TRILOGY IS ONE OF THE BEST SEIRES I HAVE EVER READ.
they are brilliant and beautiful and raw. it has phenomenal use of many many rhetorical devices and honestly??? it's like cormac mccarthy for kids. and I NEED MORE PEOPLE TO READ IT so i can TALK ABOUT IT. i need people to talk about the way religion (specifically catholicism) impacts the brothers. i need people to process the way the books speak about morality. the symbolism. the description of nature and humans and government and systems. i need to talk about it desperately.
so if you are looking for your next book for the love of god PLEASE read The Dreamers Trilogy.
and if you are one of the like 12,000 people on goodreads who have read and finished the series let's be friends. i'm begging at this point.