Dangerous Visions is a 7-book series with 7 released primary works first released in 1967 with contributions by Harlan Ellison, Isaac Asimov, Lester del Rey, Robert Silverberg, Frederik Pohl, Philip José Farmer, Miriam Allen deFord, Robert Bloch, Brian W. Aldiss, 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.