Nebula Awards Showcases is a 5-book series with 5 released primary works first released in 1966 with contributions by R.A. Lafferty, Jack Vance, Frederik Pohl, Sonya Dorman, Philip K. Dick, Gordon R. Dickson, Richard McKenna, Bob Shaw, Robin Scott Wilson, George Henry Smith, Ursula Vernon, Alaya Dawn Johnson, Nancy Kress, Jeff VanderMeer, and Sarah Pinsker.