The Frank Herbert book 'The Santaroga Barrier' has a psychoactive substance (much like the "spice" in his Dune books) called "Jaspers", named after Karl Jaspers

The Frank Herbert book 'The Santaroga Barrier' has a psychoactive substance (much like the "spice" in his Dune books) called "Jaspers", named after Karl Jaspers: https://en.wikipedia.org/wiki/The_Santaroga_Barrier https://en.wikipedia.org/wiki/The_Santaroga_Barrier