I'm about 2.5 hours in, it gets wild
from a review I found: "“Everywhere at the end of time” is centered around dementia. With each progressing stage, the listener is given a depressing look into a real-life nightmare that affects millions of people worldwide every year. The first three volumes seem to be dealing with the onset, while the last three are delving into the complete loss."
His best known stuff is "an empty Bliss Beyond this world" and I would definitely start with that!