Dangerous Visions is a 7-book series with 7 released primary works first released in 1967 with contributions by Harlan Ellison, Philip José Farmer, Miriam Allen deFord, Robert Bloch, Brian W. Aldiss, Lester del Rey, Robert Silverberg, Frederik Pohl, Isaac Asimov, Theodore Sturgeon, John Brunner, Keith Laumer, Norman Spinrad, Roger Zelazny, Samuel R. Delany, Larry Eisenberg, Henry Slesar, Sonya Dorman, John Sladek, Jonathan Brand, Kris Neville, R.A. Lafferty, and J.G. Ballard.