Recs if you like The Reality Dysfunction (Night's Dawn, #1)...

Protagonists and supporting characters who see and/or hear the dead / ghosts

Grimdark is about the dirt, the blood, and the crushing weight of reality in a world where "might is right." The genre takes its name from the tagline of 'Warhammer 40,000': "In the grim darkness of the far future, there is only war." Here is a list of 100 essential Grimdark works including standalone novels, series starters, and graphic novels.

My recommended science fiction stories (stand-alone and series) that I think are worth giving a go.