Blindsight by Peter Watts
https://www.rifters.com/real/Blindsight.htm
There are a few different ways to read/download it at the link.
Only free because the author got in a fight with his publisher and wanted folks to read it.
Take
Rendezvous with Rama and add a thick overlay of cyberpunk posthumanism and the general tone of Stephen King , and you might end up with this novel.
God knows "Rama" didn't spout obscenities, though, but the self-named "Rorschach" does here...eventually...this novel builds dread in the reader bit by bit.
So chock full of ideas, it almost bursts. E.g. evidently, vampires were a human subspecies in the distant past, and they have been genetically recreated because of their hyper-intelligence. And one is the captain of the ship sent to deal with the extraterrestrials.
I loved it, but I would suggest some background on "p-Zombies" and/or "The Chinese Room" thought experiment might be helpful in understanding it, if you aren't up to speed on current arguments about consciousness. A decent knowledge of basic neurobiology would also help. And game theory, for one section.
Other than that, intellectually easy-peasy.😁 Not uplifting in the slightest, however.
I plan to send a few bucks to the author for his emergency kitty care fund. And I will pay for the sequel,
Echopraxia.