i'm always looking for sci-fi books with a completely transporting otherworldly atmosphere if anyone has any recs specifically for that. preferably stuff with a compelling narrative to match, and not too bogged down in actual science.
		
		
	 
Have you read any of VanderMeer's work?  I know you've seen 
Annihilation, but the 
Southern Reach trilogy actually gets weirder the further you get into it.  
But if you want some seriously transporting, surreal sci-fi, check out his novel 
Borne.  It's set in an indeterminate time/place (maybe another planet) in which an anonymous "company" has ecologically devastated the environment, and the characters have to survive in a landscape replete with biologically mutated lifeforms.  The main character finds a blob of life that can assume various forms, and takes it into her care.  It's a really weird book, but definitely checks the "otherworldly" box.  His most recent book, 
Dead Astronauts, is set in the same universe; I'm about sixty pages in, and it's less accessible than Borne.
In all his works, the prose assumes a surreal distance from the narrative world.  So, you get a vague sense of something happening or whatever has happened, with occasional spurts of specificity.  It creates a very unnerving atmosphere for readers, I think.
I'd also recommend China Miéville's 
Embassytown.  Otherworldly story, fascinating narrative, kinda tough read--but excellent, I thought.