I Have No Mouth And I Must Scream
One of the more famous collections of “psychedelic” science fiction. From a man, of course, who never touched psychedelics.
The titular story is fantastic, a few others are interesting. And others still are completely forgettable. Harlan Ellison is terse, sometimes, to his own detriment. These are short short stories – oftentimes just enough to get some kooky idea across and then move on.