The Heaven Makers — Frank Herbert

Idle immortals, hungry for entertainment, turn their attention to humans in this science fiction novel by the New York Timesâ€"bestselling author of Dune.
 
Immortal aliens had observed Earth for centuries, making and viewing full sensory movies of wars, natural disasters, and horrific human activities . . . all to relieve their boredom. Then they finally became jaded by ordinary, run-of-the-mill tragedies, and found ways to create even more inventive spectacles to keep themselves amused.
 
But interfering with human activities is forbidden, and by the time Investigator Kelexel arrives to investigate, things are really getting out of hand . . .